diff --git a/devel/201_84.md b/devel/201_84.md
new file mode 100644
index 0000000000..93e98cf15b
--- /dev/null
+++ b/devel/201_84.md
@@ -0,0 +1,15 @@
+# [201_84] 默认关闭矩阵等数学环境的格线拖拽
+
+## 如何测试
+1. 插入任意样式的正常表格（大表格、小表格除外），格线应该可以正常拖拽
+2. 插入`matrix`、`bmatrix`、`Bmatrix`、`det`、`choice`、`stack`等数学环境，格线应该不支持拖拽
+3. 插入`align`、`eqnarray`、`gather`、`multline`、`alignat`、`flalign`等数学环境，格线也应该不支持拖拽
+
+## 2026/2/13
+### What
+在诸多以表格为底层数据模型的数学环境下，很多组件在编辑时，格线不应支持拖拽
+
+### How
+1. 在`edit_interface_rep::is_true_table`中，增加对诸多数学环境的判断
+2. 在`edit_mouse::table_line_hit`中，增加对`is_true_table`的判断，以保障鼠标悬浮的变形和拖动被`table_line_hit`时禁用
+3. 清除`hovering_table=-1`这个没有必要的情况分支
\ No newline at end of file
diff --git a/src/Edit/Interface/edit_interface.cpp b/src/Edit/Interface/edit_interface.cpp
index 66bd4d305d..c65af55272 100644
--- a/src/Edit/Interface/edit_interface.cpp
+++ b/src/Edit/Interface/edit_interface.cpp
@@ -1195,6 +1195,14 @@ edit_interface_rep::is_true_table (path p) {
         is_compound (qt, "alignat") || is_compound (qt, "alignat*") ||
         is_compound (qt, "flalign") || is_compound (qt, "flalign*"))
       return false;
+    if (is_compound (qt, "cases") || is_compound (qt, "choice") ||
+        is_compound (qt, "det") || is_compound (qt, "stack") ||
+        is_compound (qt, "array") || is_compound (qt, "array*") ||
+        is_compound (qt, "matrix") || is_compound (qt, "matrix*") ||
+        is_compound (qt, "bmatrix") || is_compound (qt, "Bmatrix") ||
+        is_compound (qt, "pmatrix") || is_compound (qt, "vmatrix") ||
+        is_compound (qt, "Vmatrix") || is_compound (qt, "smallmatrix"))
+      return false;
   }
   return true;
 }
diff --git a/src/Edit/Interface/edit_mouse.cpp b/src/Edit/Interface/edit_mouse.cpp
index ed686b7b2b..a378f1bb61 100644
--- a/src/Edit/Interface/edit_mouse.cpp
+++ b/src/Edit/Interface/edit_mouse.cpp
@@ -571,7 +571,8 @@ edit_interface_rep::table_line_hit (SI x, SI y, table_hit& hit) {
   hit.second_size= as_int (r[5]);
   hit.fp         = as_path (as_string (r[8]));
 
-  if (is_nil (hit.fp) || hit.index <= 0) return false;
+  if (is_nil (hit.fp) || hit.index <= 0 || !is_true_table (hit.fp))
+    return false;
   return true;
 }
 
@@ -822,13 +823,11 @@ edit_interface_rep::mouse_any (string type, SI x, SI y, int mods, time_t t,
 
   int hovering_table= 0;
   if (type == "move" || type == "dragging-left" || type == "dragging-right") {
-    rectangles rs;
-    tree       r= eb->message (tree ("table-loc?"), x, y, rs);
-    if (is_func (r, TUPLE) && r[0] == "table-loc") {
-      string orient= as_string (r[1]);
-      if (orient == "cell") hovering_table= -1;
-      else if (orient == "row") hovering_table= 1;
-      else if (orient == "col") hovering_table= 2;
+    table_hit hit;
+    if (table_line_hit (x, y, hit)) {
+      if (hit.orient == "cell") hovering_table= -1;
+      else if (hit.orient == "row") hovering_table= 1;
+      else if (hit.orient == "col") hovering_table= 2;
     }
   }
   bool hovering_hlink= false;
@@ -907,13 +906,8 @@ edit_interface_rep::mouse_any (string type, SI x, SI y, int mods, time_t t,
     if (handle_cursor != "") set_cursor_style (handle_cursor);
     else set_cursor_style ("size_all");
   }
-  else if (hovering_table) {
-    if (hovering_table == -1) {
-      set_cursor_style ("normal");
-      // draw table resizing handles
-    }
-    else set_cursor_style (hovering_table == 1 ? "size_ver" : "size_hor");
-  }
+  else if (hovering_table)
+    set_cursor_style (hovering_table == 1 ? "size_ver" : "size_hor");
   else if (hovering_hlink) set_cursor_style ("pointing_hand");
   else if (hovering_image) {
     set_cursor_style ("pointing_hand");