diff --git a/core/web_api.py b/core/web_api.py
index eba3cb8..7922a35 100644
--- a/core/web_api.py
+++ b/core/web_api.py
@@ -808,7 +808,8 @@ def get_graph():
     
     # 查询关系（边）
     cursor.execute("""
-        SELECT r.id, r.source_id, r.target_id, r.relation_type, r.confidence, r.status
+        SELECT r.id, r.source_id, r.target_id, r.relation_type,
+               r.confidence, r.status, r.created_at, r.updated_at
         FROM relations r
         WHERE r.status = 'active'
     """)
@@ -821,7 +822,9 @@ def get_graph():
             "target": row['target_id'],
             "relation_type": row['relation_type'],
             "confidence": row['confidence'],
-            "status": row['status']
+            "status": row['status'],
+            "created_at": row['created_at'],
+            "updated_at": row['updated_at']
         })
     
     return jsonify({
diff --git a/ui/static/graph.html b/ui/static/graph.html
index 4caac28..037941a 100644
--- a/ui/static/graph.html
+++ b/ui/static/graph.html
@@ -548,6 +548,7 @@
         let currentHighlightIds = [];
         let currentHighlightEdgeIds = new Set(); // 存储高亮的边ID
         let edgeParticles = {}; // 存储边的流动光点 {edgeId: {mesh, progress, edge}}
+        let edgeLabels = []; // 存储边标签
 
         // 颜色映射
         const typeColors = {
@@ -812,11 +813,13 @@ function init() {
             // 清除旧的对象（包括边粒子）
             nodeMeshes.forEach(mesh => scene.remove(mesh));
             edgeLines.forEach(line => scene.remove(line));
+            edgeLabels.forEach(label => scene.remove(label));
             Object.keys(edgeParticles).forEach(key => {
                 scene.remove(edgeParticles[key].mesh);
             });
             nodeMeshes = [];
             edgeLines = [];
+            edgeLabels = [];
             edgeParticles = {};
 
             if (nodes.length === 0) return;
@@ -1081,6 +1084,53 @@ function init() {
 
                 scene.add(line);
                 edgeLines.push(line);
+
+                // 边标签（中间位置显示关系类型 + 时间戳）
+                const midX = (pos1.x + pos2.x) / 2;
+                const midY = (pos1.y + pos2.y) / 2;
+                const midZ = (pos1.z + pos2.z) / 2;
+
+                const labelCanvas = document.createElement('canvas');
+                const labelCtx = labelCanvas.getContext('2d');
+                labelCanvas.width = 256;
+                labelCanvas.height = 48;
+                labelCtx.clearRect(0, 0, labelCanvas.width, labelCanvas.height);
+
+                // 时间戳文本
+                const ts = edge.created_at || '';
+                const tsShort = ts ? ts.substring(0, 10) : '';
+                let labelText = edge.relation_type;
+                if (tsShort) labelText += '\n' + tsShort;
+
+                labelCtx.font = '16px Courier New';
+                labelCtx.fillStyle = color;
+                labelCtx.textAlign = 'center';
+                labelCtx.shadowColor = color;
+                labelCtx.shadowBlur = 4;
+                labelCtx.fillText(edge.relation_type, 128, 20);
+                if (tsShort) {
+                    labelCtx.font = '12px Courier New';
+                    labelCtx.fillStyle = '#999999';
+                    labelCtx.fillText(tsShort, 128, 38);
+                }
+
+                const labelTex = new THREE.CanvasTexture(labelCanvas);
+                labelTex.needsUpdate = true;
+                const labelMat = new THREE.SpriteMaterial({
+                    map: labelTex,
+                    transparent: true,
+                    opacity: 0.7,
+                    depthTest: false,
+                    depthWrite: false,
+                    blending: THREE.AdditiveBlending
+                });
+                const edgeLabel = new THREE.Sprite(labelMat);
+                edgeLabel.scale.set(5, 1, 1);
+                edgeLabel.position.set(midX, midY, midZ);
+                edgeLabel.userData = { edgeId: edge.id };
+
+                scene.add(edgeLabel);
+                edgeLabels.push(edgeLabel);
             });
 
             // 调整相机位置以适应所有节点