diff --git a/go-backend/internal/http/handler/control_plane.go b/go-backend/internal/http/handler/control_plane.go
index a366b06..86b691d 100644
--- a/go-backend/internal/http/handler/control_plane.go
+++ b/go-backend/internal/http/handler/control_plane.go
@@ -8,6 +8,7 @@ import (
 	"sort"
 	"strconv"
 	"strings"
+	"sync"
 	"time"
 
 	"go-backend/internal/http/client"
@@ -30,6 +31,19 @@ type diagnosisTarget struct {
 	Port    int
 }
 
+type diagnosisWorkItem struct {
+	fromNodeID   int64
+	targetIP     string
+	targetPort   int
+	description  string
+	metadata     map[string]interface{}
+	toNode       chainNodeRecord
+	hasChainHop  bool
+	ipPreference string
+}
+
+const diagnosisMaxConcurrency = 8
+
 func (h *Handler) resolveForwardAccess(r *http.Request, forwardID int64) (*forwardRecord, int64, int, error) {
 	userID, roleID, err := userRoleFromRequest(r)
 	if err != nil {
@@ -304,7 +318,7 @@ func (h *Handler) sendNodeCommand(nodeID int64, commandType string, data interfa
 	if nodeErr == nil && node != nil && node.IsRemote == 1 {
 		result, err = h.sendRemoteNodeCommand(node, commandType, data)
 	} else {
-		result, err = h.wsServer.SendCommand(nodeID, commandType, data, 12*time.Second)
+		result, err = h.wsServer.SendCommand(nodeID, commandType, data, 6*time.Second)
 	}
 	if err == nil {
 		return result, nil
@@ -386,16 +400,21 @@ func (h *Handler) diagnoseForwardRuntime(forward *forwardRecord) (map[string]int
 	ipPreference := h.repo.GetTunnelIPPreference(forward.TunnelID)
 
 	inNodes, chainHops, outNodes := splitChainNodeGroups(chainRows)
-	results := make([]map[string]interface{}, 0, len(chainRows)*2+len(targets))
-	nodeCache := map[int64]*nodeRecord{}
+	workItems := make([]diagnosisWorkItem, 0, len(chainRows)*2+len(targets))
 
 	switch tunnel.Type {
 	case 1:
 		for _, inNode := range inNodes {
 			for _, target := range targets {
 				description := fmt.Sprintf("入口(%s)->目标(%s)", inNode.NodeName, target.Address)
-				h.appendPathDiagnosis(&results, nodeCache, inNode.NodeID, target.IP, target.Port, description, map[string]interface{}{
-					"fromChainType": 1,
+				workItems = append(workItems, diagnosisWorkItem{
+					fromNodeID:  inNode.NodeID,
+					targetIP:    target.IP,
+					targetPort:  target.Port,
+					description: description,
+					metadata: map[string]interface{}{
+						"fromChainType": 1,
+					},
 				})
 			}
 		}
@@ -404,19 +423,33 @@ func (h *Handler) diagnoseForwardRuntime(forward *forwardRecord) (map[string]int
 			if len(chainHops) > 0 {
 				for _, firstNode := range chainHops[0] {
 					description := fmt.Sprintf("入口(%s)->第1跳(%s)", inNode.NodeName, firstNode.NodeName)
-					h.appendChainHopDiagnosis(&results, nodeCache, inNode.NodeID, firstNode, description, map[string]interface{}{
-						"fromChainType": 1,
-						"toChainType":   2,
-						"toInx":         firstNode.Inx,
-					}, ipPreference)
+					workItems = append(workItems, diagnosisWorkItem{
+						fromNodeID:   inNode.NodeID,
+						toNode:       firstNode,
+						hasChainHop:  true,
+						ipPreference: ipPreference,
+						description:  description,
+						metadata: map[string]interface{}{
+							"fromChainType": 1,
+							"toChainType":   2,
+							"toInx":         firstNode.Inx,
+						},
+					})
 				}
 			} else {
 				for _, outNode := range outNodes {
 					description := fmt.Sprintf("入口(%s)->出口(%s)", inNode.NodeName, outNode.NodeName)
-					h.appendChainHopDiagnosis(&results, nodeCache, inNode.NodeID, outNode, description, map[string]interface{}{
-						"fromChainType": 1,
-						"toChainType":   3,
-					}, ipPreference)
+					workItems = append(workItems, diagnosisWorkItem{
+						fromNodeID:   inNode.NodeID,
+						toNode:       outNode,
+						hasChainHop:  true,
+						ipPreference: ipPreference,
+						description:  description,
+						metadata: map[string]interface{}{
+							"fromChainType": 1,
+							"toChainType":   3,
+						},
+					})
 				}
 			}
 		}
@@ -426,21 +459,35 @@ func (h *Handler) diagnoseForwardRuntime(forward *forwardRecord) (map[string]int
 				if i+1 < len(chainHops) {
 					for _, nextNode := range chainHops[i+1] {
 						description := fmt.Sprintf("第%d跳(%s)->第%d跳(%s)", i+1, currentNode.NodeName, i+2, nextNode.NodeName)
-						h.appendChainHopDiagnosis(&results, nodeCache, currentNode.NodeID, nextNode, description, map[string]interface{}{
-							"fromChainType": 2,
-							"fromInx":       currentNode.Inx,
-							"toChainType":   2,
-							"toInx":         nextNode.Inx,
-						}, ipPreference)
+						workItems = append(workItems, diagnosisWorkItem{
+							fromNodeID:   currentNode.NodeID,
+							toNode:       nextNode,
+							hasChainHop:  true,
+							ipPreference: ipPreference,
+							description:  description,
+							metadata: map[string]interface{}{
+								"fromChainType": 2,
+								"fromInx":       currentNode.Inx,
+								"toChainType":   2,
+								"toInx":         nextNode.Inx,
+							},
+						})
 					}
 				} else {
 					for _, outNode := range outNodes {
 						description := fmt.Sprintf("第%d跳(%s)->出口(%s)", i+1, currentNode.NodeName, outNode.NodeName)
-						h.appendChainHopDiagnosis(&results, nodeCache, currentNode.NodeID, outNode, description, map[string]interface{}{
-							"fromChainType": 2,
-							"fromInx":       currentNode.Inx,
-							"toChainType":   3,
-						}, ipPreference)
+						workItems = append(workItems, diagnosisWorkItem{
+							fromNodeID:   currentNode.NodeID,
+							toNode:       outNode,
+							hasChainHop:  true,
+							ipPreference: ipPreference,
+							description:  description,
+							metadata: map[string]interface{}{
+								"fromChainType": 2,
+								"fromInx":       currentNode.Inx,
+								"toChainType":   3,
+							},
+						})
 					}
 				}
 			}
@@ -449,8 +496,14 @@ func (h *Handler) diagnoseForwardRuntime(forward *forwardRecord) (map[string]int
 		for _, outNode := range outNodes {
 			for _, target := range targets {
 				description := fmt.Sprintf("出口(%s)->目标(%s)", outNode.NodeName, target.Address)
-				h.appendPathDiagnosis(&results, nodeCache, outNode.NodeID, target.IP, target.Port, description, map[string]interface{}{
-					"fromChainType": 3,
+				workItems = append(workItems, diagnosisWorkItem{
+					fromNodeID:  outNode.NodeID,
+					targetIP:    target.IP,
+					targetPort:  target.Port,
+					description: description,
+					metadata: map[string]interface{}{
+						"fromChainType": 3,
+					},
 				})
 			}
 		}
@@ -458,13 +511,21 @@ func (h *Handler) diagnoseForwardRuntime(forward *forwardRecord) (map[string]int
 		for _, inNode := range inNodes {
 			for _, target := range targets {
 				description := fmt.Sprintf("入口(%s)->目标(%s)", inNode.NodeName, target.Address)
-				h.appendPathDiagnosis(&results, nodeCache, inNode.NodeID, target.IP, target.Port, description, map[string]interface{}{
-					"fromChainType": 1,
+				workItems = append(workItems, diagnosisWorkItem{
+					fromNodeID:  inNode.NodeID,
+					targetIP:    target.IP,
+					targetPort:  target.Port,
+					description: description,
+					metadata: map[string]interface{}{
+						"fromChainType": 1,
+					},
 				})
 			}
 		}
 	}
 
+	results := h.runDiagnosisWorkItems(workItems)
+
 	payload := map[string]interface{}{
 		"forwardName": forward.Name,
 		"timestamp":   time.Now().UnixMilli(),
@@ -497,15 +558,20 @@ func (h *Handler) diagnoseTunnelRuntime(tunnelID int64) (map[string]interface{},
 
 	ipPreference := h.repo.GetTunnelIPPreference(tunnelID)
 	inNodes, chainHops, outNodes := splitChainNodeGroups(chainRows)
-	results := make([]map[string]interface{}, 0, len(chainRows)*2)
-	nodeCache := map[int64]*nodeRecord{}
+	workItems := make([]diagnosisWorkItem, 0, len(chainRows)*2)
 
 	switch tunnel.Type {
 	case 1:
 		for _, inNode := range inNodes {
 			description := fmt.Sprintf("入口(%s)->外网", inNode.NodeName)
-			h.appendPathDiagnosis(&results, nodeCache, inNode.NodeID, "www.bing.com", 443, description, map[string]interface{}{
-				"fromChainType": 1,
+			workItems = append(workItems, diagnosisWorkItem{
+				fromNodeID:  inNode.NodeID,
+				targetIP:    "www.bing.com",
+				targetPort:  443,
+				description: description,
+				metadata: map[string]interface{}{
+					"fromChainType": 1,
+				},
 			})
 		}
 	case 2:
@@ -513,19 +579,33 @@ func (h *Handler) diagnoseTunnelRuntime(tunnelID int64) (map[string]interface{},
 			if len(chainHops) > 0 {
 				for _, firstNode := range chainHops[0] {
 					description := fmt.Sprintf("入口(%s)->第1跳(%s)", inNode.NodeName, firstNode.NodeName)
-					h.appendChainHopDiagnosis(&results, nodeCache, inNode.NodeID, firstNode, description, map[string]interface{}{
-						"fromChainType": 1,
-						"toChainType":   2,
-						"toInx":         firstNode.Inx,
-					}, ipPreference)
+					workItems = append(workItems, diagnosisWorkItem{
+						fromNodeID:   inNode.NodeID,
+						toNode:       firstNode,
+						hasChainHop:  true,
+						ipPreference: ipPreference,
+						description:  description,
+						metadata: map[string]interface{}{
+							"fromChainType": 1,
+							"toChainType":   2,
+							"toInx":         firstNode.Inx,
+						},
+					})
 				}
 			} else {
 				for _, outNode := range outNodes {
 					description := fmt.Sprintf("入口(%s)->出口(%s)", inNode.NodeName, outNode.NodeName)
-					h.appendChainHopDiagnosis(&results, nodeCache, inNode.NodeID, outNode, description, map[string]interface{}{
-						"fromChainType": 1,
-						"toChainType":   3,
-					}, ipPreference)
+					workItems = append(workItems, diagnosisWorkItem{
+						fromNodeID:   inNode.NodeID,
+						toNode:       outNode,
+						hasChainHop:  true,
+						ipPreference: ipPreference,
+						description:  description,
+						metadata: map[string]interface{}{
+							"fromChainType": 1,
+							"toChainType":   3,
+						},
+					})
 				}
 			}
 		}
@@ -535,21 +615,35 @@ func (h *Handler) diagnoseTunnelRuntime(tunnelID int64) (map[string]interface{},
 				if i+1 < len(chainHops) {
 					for _, nextNode := range chainHops[i+1] {
 						description := fmt.Sprintf("第%d跳(%s)->第%d跳(%s)", i+1, currentNode.NodeName, i+2, nextNode.NodeName)
-						h.appendChainHopDiagnosis(&results, nodeCache, currentNode.NodeID, nextNode, description, map[string]interface{}{
-							"fromChainType": 2,
-							"fromInx":       currentNode.Inx,
-							"toChainType":   2,
-							"toInx":         nextNode.Inx,
-						}, ipPreference)
+						workItems = append(workItems, diagnosisWorkItem{
+							fromNodeID:   currentNode.NodeID,
+							toNode:       nextNode,
+							hasChainHop:  true,
+							ipPreference: ipPreference,
+							description:  description,
+							metadata: map[string]interface{}{
+								"fromChainType": 2,
+								"fromInx":       currentNode.Inx,
+								"toChainType":   2,
+								"toInx":         nextNode.Inx,
+							},
+						})
 					}
 				} else {
 					for _, outNode := range outNodes {
 						description := fmt.Sprintf("第%d跳(%s)->出口(%s)", i+1, currentNode.NodeName, outNode.NodeName)
-						h.appendChainHopDiagnosis(&results, nodeCache, currentNode.NodeID, outNode, description, map[string]interface{}{
-							"fromChainType": 2,
-							"fromInx":       currentNode.Inx,
-							"toChainType":   3,
-						}, ipPreference)
+						workItems = append(workItems, diagnosisWorkItem{
+							fromNodeID:   currentNode.NodeID,
+							toNode:       outNode,
+							hasChainHop:  true,
+							ipPreference: ipPreference,
+							description:  description,
+							metadata: map[string]interface{}{
+								"fromChainType": 2,
+								"fromInx":       currentNode.Inx,
+								"toChainType":   3,
+							},
+						})
 					}
 				}
 			}
@@ -557,19 +651,33 @@ func (h *Handler) diagnoseTunnelRuntime(tunnelID int64) (map[string]interface{},
 
 		for _, outNode := range outNodes {
 			description := fmt.Sprintf("出口(%s)->外网", outNode.NodeName)
-			h.appendPathDiagnosis(&results, nodeCache, outNode.NodeID, "www.bing.com", 443, description, map[string]interface{}{
-				"fromChainType": 3,
+			workItems = append(workItems, diagnosisWorkItem{
+				fromNodeID:  outNode.NodeID,
+				targetIP:    "www.bing.com",
+				targetPort:  443,
+				description: description,
+				metadata: map[string]interface{}{
+					"fromChainType": 3,
+				},
 			})
 		}
 	default:
 		for _, inNode := range inNodes {
 			description := fmt.Sprintf("入口(%s)->外网", inNode.NodeName)
-			h.appendPathDiagnosis(&results, nodeCache, inNode.NodeID, "www.bing.com", 443, description, map[string]interface{}{
-				"fromChainType": 1,
+			workItems = append(workItems, diagnosisWorkItem{
+				fromNodeID:  inNode.NodeID,
+				targetIP:    "www.bing.com",
+				targetPort:  443,
+				description: description,
+				metadata: map[string]interface{}{
+					"fromChainType": 1,
+				},
 			})
 		}
 	}
 
+	results := h.runDiagnosisWorkItems(workItems)
+
 	payload := map[string]interface{}{
 		"tunnelName": tunnelName,
 		"tunnelType": map[bool]string{true: "端口转发", false: "隧道转发"}[tunnel.Type == 1],
@@ -628,6 +736,50 @@ func resolveDiagnosisTargets(remoteAddr string) ([]diagnosisTarget, error) {
 	return targets, nil
 }
 
+func (h *Handler) runDiagnosisWorkItems(workItems []diagnosisWorkItem) []map[string]interface{} {
+	results := make([]map[string]interface{}, len(workItems))
+	if len(workItems) == 0 {
+		return results
+	}
+	workerLimit := diagnosisMaxConcurrency
+	if workerLimit < 1 {
+		workerLimit = 1
+	}
+	if workerLimit > len(workItems) {
+		workerLimit = len(workItems)
+	}
+	semaphore := make(chan struct{}, workerLimit)
+
+	var wg sync.WaitGroup
+	for i := range workItems {
+		wg.Add(1)
+		semaphore <- struct{}{}
+		go func(index int) {
+			defer wg.Done()
+			defer func() { <-semaphore }()
+
+			workItem := workItems[index]
+			single := make([]map[string]interface{}, 0, 1)
+			nodeCache := map[int64]*nodeRecord{}
+			if workItem.hasChainHop {
+				h.appendChainHopDiagnosis(&single, nodeCache, workItem.fromNodeID, workItem.toNode, workItem.description, workItem.metadata, workItem.ipPreference)
+			} else {
+				h.appendPathDiagnosis(&single, nodeCache, workItem.fromNodeID, workItem.targetIP, workItem.targetPort, workItem.description, workItem.metadata)
+			}
+
+			if len(single) == 0 {
+				results[index] = newDiagnosisResultItem(workItem.fromNodeID, workItem.targetIP, workItem.targetPort, workItem.description, workItem.metadata)
+				results[index]["success"] = false
+				results[index]["message"] = "诊断任务未返回结果"
+				return
+			}
+			results[index] = single[0]
+		}(i)
+	}
+	wg.Wait()
+	return results
+}
+
 func (h *Handler) cachedNode(nodeCache map[int64]*nodeRecord, nodeID int64) (*nodeRecord, error) {
 	if node, ok := nodeCache[nodeID]; ok {
 		return node, nil
diff --git a/vite-frontend/package.json b/vite-frontend/package.json
index b8ac354..cc7fa3d 100644
--- a/vite-frontend/package.json
+++ b/vite-frontend/package.json
@@ -80,5 +80,8 @@
     "vite": "npm:rolldown-vite@^7.3.1",
     "vite-plugin-pwa": "^1.1.0",
     "vite-tsconfig-paths": "^6.0.5"
+  },
+  "overrides": {
+    "serialize-javascript": "7.0.3"
   }
 }
diff --git a/vite-frontend/src/api/index.ts b/vite-frontend/src/api/index.ts
index 4df128b..3e84015 100644
--- a/vite-frontend/src/api/index.ts
+++ b/vite-frontend/src/api/index.ts
@@ -118,7 +118,11 @@ export const updateTunnel = (data: TunnelMutationPayload) =>
 export const deleteTunnel = (id: number) =>
   Network.post("/tunnel/delete", { id });
 export const diagnoseTunnel = (tunnelId: number) =>
-  Network.post<TunnelDiagnosisApiData>("/tunnel/diagnose", { tunnelId });
+  Network.post<TunnelDiagnosisApiData>(
+    "/tunnel/diagnose",
+    { tunnelId },
+    { timeout: 60 * 1000 },
+  );
 export const updateTunnelOrder = (data: {
   tunnels: Array<{ id: number; inx: number }>;
 }) => Network.post("/tunnel/update-order", data);
@@ -159,7 +163,11 @@ export const resumeForwardService = (forwardId: number) =>
 
 // 转发诊断操作
 export const diagnoseForward = (forwardId: number) =>
-  Network.post<ForwardDiagnosisApiData>("/forward/diagnose", { forwardId });
+  Network.post<ForwardDiagnosisApiData>(
+    "/forward/diagnose",
+    { forwardId },
+    { timeout: 60 * 1000 },
+  );
 
 // 转发排序操作
 export const updateForwardOrder = (data: {