diff --git a/SCADA/Pages/UC_WeighingAnalysis.cs b/SCADA/Pages/UC_WeighingAnalysis.cs
index b1183d2..2bb8f88 100644
--- a/SCADA/Pages/UC_WeighingAnalysis.cs
+++ b/SCADA/Pages/UC_WeighingAnalysis.cs
@@ -35,12 +35,15 @@ namespace MesWork.Pages
         private readonly Label lbl_Product = new Label();
         private readonly Label lbl_Sample = new Label();
         private readonly Label lbl_Status = new Label();
+        private readonly ToolTip tip_Point = new ToolTip();
 
         private readonly List<decimal> _points = new List<decimal>();
+        private PointF[] _chartPoints = new PointF[0];
         private int _finalStartSeq;
         private int _finalEndSeq;
         private decimal? _finalWeight;
         private int _sampleIntervalMs;
+        private int _lastTipSeq;
 
         private static readonly Color ClrPrimary = Color.FromArgb(74, 144, 217);
         private static readonly Color ClrPrimaryDark = Color.FromArgb(30, 58, 95);
@@ -61,6 +64,8 @@ namespace MesWork.Pages
             SetHint(txt_OrderNo, "工单号...");
             pnl_Chart.Paint += pnl_Chart_Paint;
             pnl_Chart.Resize += (s, e) => pnl_Chart.Invalidate();
+            pnl_Chart.MouseMove += pnl_Chart_MouseMove;
+            pnl_Chart.MouseLeave += (s, e) => HidePointTip();
         }
 
         private void InitializeLayout()
@@ -283,6 +288,7 @@ namespace MesWork.Pages
         private void LoadCurve(DataRow row)
         {
             _points.Clear();
+            HidePointTip();
             string pointValues = row.Table.Columns.Contains("点位值") ? row["点位值"]?.ToString() : "";
             foreach (string item in (pointValues ?? "").Split('|'))
             {
@@ -311,6 +317,7 @@ namespace MesWork.Pages
         private void ClearCurve(string msg)
         {
             _points.Clear();
+            HidePointTip();
             _finalWeight = null;
             _finalStartSeq = 0;
             _finalEndSeq = 0;
@@ -357,6 +364,7 @@ namespace MesWork.Pages
 
             if (_points.Count == 0)
             {
+                _chartPoints = new PointF[0];
                 DrawCenterText(g, rect, "选择一条称重记录后显示曲线");
                 return;
             }
@@ -372,10 +380,10 @@ namespace MesWork.Pages
 
             DrawGrid(g, padL, padT, chartW, chartH, minVal, maxVal);
 
-            PointF[] points = BuildPointLocations(padL, padT, chartW, chartH, minVal, maxVal);
-            DrawHighlightWindow(g, points, padT, chartH);
-            DrawCurve(g, points);
-            DrawPoints(g, points);
+            _chartPoints = BuildPointLocations(padL, padT, chartW, chartH, minVal, maxVal);
+            DrawHighlightWindow(g, _chartPoints, padT, chartH);
+            DrawCurve(g, _chartPoints);
+            DrawPoints(g, _chartPoints);
             DrawFinalLine(g, padL, padT, chartW, chartH, minVal, maxVal);
         }
 
@@ -470,6 +478,60 @@ namespace MesWork.Pages
             return _finalStartSeq > 0 && _finalEndSeq > 0 && seq >= _finalStartSeq && seq <= _finalEndSeq;
         }
 
+        private void pnl_Chart_MouseMove(object sender, MouseEventArgs e)
+        {
+            int index = FindNearestPointIndex(e.Location);
+            if (index < 0)
+            {
+                HidePointTip();
+                return;
+            }
+
+            int seq = index + 1;
+            if (seq == _lastTipSeq) return;
+
+            _lastTipSeq = seq;
+            string finalText = IsInFinalWindow(seq) ? "\r\n取值依据：最终采用区间内" : "";
+            string tipText = $"第 {seq} 点\r\n重量：{_points[index]:F3} kg\r\n时间：{FormatElapsedTime(seq)}{finalText}";
+            tip_Point.Show(tipText, pnl_Chart, e.Location.X + 16, e.Location.Y + 16, 3000);
+        }
+
+        private int FindNearestPointIndex(Point mouse)
+        {
+            if (_chartPoints.Length == 0 || _points.Count == 0) return -1;
+
+            int nearestIndex = -1;
+            double nearestDistance = double.MaxValue;
+            for (int i = 0; i < _chartPoints.Length; i++)
+            {
+                double dx = _chartPoints[i].X - mouse.X;
+                double dy = _chartPoints[i].Y - mouse.Y;
+                double distance = dx * dx + dy * dy;
+                if (distance < nearestDistance)
+                {
+                    nearestDistance = distance;
+                    nearestIndex = i;
+                }
+            }
+
+            return nearestDistance <= 144 ? nearestIndex : -1; // 鼠标离点 12px 内才显示，避免误触。
+        }
+
+        private string FormatElapsedTime(int seq)
+        {
+            int interval = _sampleIntervalMs > 0 ? _sampleIntervalMs : 200;
+            int totalMs = Math.Max(0, seq - 1) * interval; // 第1点按采集起点0ms估算。
+            int seconds = totalMs / 1000;
+            int milliseconds = totalMs % 1000;
+            return $"{seconds}秒{milliseconds:D3}毫秒";
+        }
+
+        private void HidePointTip()
+        {
+            _lastTipSeq = 0;
+            tip_Point.Hide(pnl_Chart);
+        }
+
         private void DrawCenterText(Graphics g, Rectangle rect, string text)
         {
             using (var font = new Font("微软雅黑", 14F))