diff --git a/tools/excel2drawio.py b/tools/excel2drawio.py
new file mode 100644
index 0000000..d4b48e1
--- /dev/null
+++ b/tools/excel2drawio.py
@@ -0,0 +1,173 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+excel2drawio.py — 从 Excel 股权关系表生成 drawio 股权架构图
+=============================================================
+用法:
+    python3 excel2drawio.py 输入.xlsx [输出.drawio]
+
+Excel 格式 (Sheet 名任意, 表头必须为以下列名):
+    母公司名称 | 子公司名称 | 股权比例(%) | 备注
+  每行 = 一条股权关系。无母公司的公司 = 根节点(集团/母公司)。
+  例:
+    母公司名称    子公司名称    股权比例(%)   备注
+    集团总公司    子公司A       100           全资
+    集团总公司    子公司B       60            控股
+    子公司A      孙公司C        51            控股
+
+输出: drawio 格式 XML, 可用 drawio 桌面版/网页版打开, 或嵌入网页。
+"""
+import sys, math
+import openpyxl
+
+# ---------- 样式 ----------
+STYLE_ROOT = "rounded=1;whiteSpace=wrap;html=1;fillColor=#1e6fd9;fontColor=#ffffff;strokeColor=#0d47a1;fontSize=13;fontStyle=1;"
+STYLE_NODE = "rounded=1;whiteSpace=wrap;html=1;fillColor=#e8f0fe;fontColor=#000000;strokeColor=#5b9bd5;fontSize=11;"
+STYLE_LEAF = "rounded=1;whiteSpace=wrap;html=1;fillColor=#f5f5f5;fontColor=#000000;strokeColor=#999999;fontSize=11;"
+STYLE_EDGE = "edgeStyle=orthogonalEdgeStyle;rounded=1;html=1;strokeColor=#666666;strokeWidth=1.5;fontSize=10;"
+COL_W, COL_H = 180, 44          # 节点宽高
+GAP_X, GAP_Y = 30, 80           # 横向/纵向间距
+
+
+def read_relations(xlsx_path):
+    """读取 Excel, 返回 (关系列表, 所有公司集合)"""
+    wb = openpyxl.load_workbook(xlsx_path, data_only=True)
+    ws = wb.active
+    rows = list(ws.iter_rows(values_only=True))
+    if not rows:
+        sys.exit("Excel 为空")
+    header = [str(c).strip() if c else "" for c in rows[0]]
+    # 兼容列名变体：先精确匹配，再包含匹配（按 names 顺序优先）
+    def col(*names):
+        for i, h in enumerate(header):
+            if h in names:
+                return i
+        for n in names:
+            for i, h in enumerate(header):
+                if n in h:
+                    return i
+        return None
+    i_parent = col("母公司", "父公司", "上级")
+    i_child = col("子公司", "公司", "被投")
+    i_ratio = col("股权比例", "比例", "持股")
+    i_note = col("备注")
+    if i_parent is None or i_child is None:
+        sys.exit(f"表头需要包含「母公司名称」「子公司名称」列, 实际: {header}")
+    relations, companies = [], set()
+    for r in rows[1:]:
+        if not r or all(v is None or str(v).strip() == "" for v in r):
+            continue
+        parent = str(r[i_parent]).strip() if i_parent is not None and r[i_parent] else ""
+        child = str(r[i_child]).strip() if r[i_child] else ""
+        if not child:
+            continue
+        ratio = r[i_ratio] if i_ratio is not None and r[i_ratio] is not None else ""
+        note = str(r[i_note]).strip() if i_note is not None and r[i_note] else ""
+        relations.append((parent, child, ratio, note))
+        companies.add(child)
+        if parent:
+            companies.add(parent)
+    return relations, companies
+
+
+def build_levels(relations, companies):
+    """计算每家公司层级 (根=0), 返回 {公司: 层级}"""
+    children = {}
+    for p, c, _, _ in relations:
+        children.setdefault(p, []).append(c)
+    # 没有作为子节点出现的公司 = 根（集团/母公司）
+    as_child = {c for _, c, _, _ in relations}
+    roots = [c for c in companies if c not in as_child]
+    level = {}
+    def dfs(node, lv):
+        if node in level and level[node] <= lv:
+            return
+        level[node] = lv
+        for ch in children.get(node, []):
+            dfs(ch, lv + 1)
+    for r in roots:
+        dfs(r, 0)
+    # 兜底: 未覆盖的孤儿节点
+    for c in companies:
+        if c not in level:
+            level[c] = 0
+    return level, roots
+
+
+def generate_drawio(relations, companies, xlsx_path):
+    level, roots = build_levels(relations, companies)
+    # 按层级分组, 保持输入顺序
+    order = []
+    seen = set()
+    def add(n):
+        if n not in seen:
+            seen.add(n); order.append(n)
+    for p, c, _, _ in relations:
+        add(p); add(c)
+    for c in companies:
+        add(c)
+    by_level = {}
+    for n in order:
+        by_level.setdefault(level[n], []).append(n)
+    max_lv = max(level.values())
+    # 计算每层宽度 → 画布大小
+    positions = {}
+    for lv, nodes in by_level.items():
+        n = len(nodes)
+        x0 = (n - 1) * (COL_W + GAP_X) / 2
+        for i, node in enumerate(nodes):
+            positions[node] = (x0 - i * (COL_W + GAP_X), lv * (COL_H + GAP_Y))
+    canvas_w = max((x + COL_W for x, _ in positions.values()), default=800) + 100
+    canvas_h = (max_lv + 1) * (COL_H + GAP_Y) + 60
+
+    # 节点样式: 根=深蓝, 有子公司=浅蓝, 叶子=灰
+    children = {p for p, _, _, _ in relations}
+    lines = []
+    lines.append(f'<mxGraphModel dx="1200" dy="800" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="1" pageScale="1" pageWidth="{int(canvas_w)}" pageHeight="{int(canvas_h)}" math="0" shadow="0">')
+    lines.append('<root><mxCell id="0"/><mxCell id="1" parent="0"/>')
+    nid = 1
+    for node in order:
+        nid += 1
+        x, y = positions[node]
+        if node in roots:
+            style = STYLE_ROOT
+        elif node in children:
+            style = STYLE_NODE
+        else:
+            style = STYLE_LEAF
+        lines.append(f'<mxCell id="{nid}" value="{node}" style="{style}" vertex="1" parent="1"><mxGeometry x="{int(x)}" y="{int(y)}" width="{COL_W}" height="{COL_H}" as="geometry"/></mxCell>')
+        positions[node] = (nid, x, y)  # 记录 id
+    for p, c, ratio, note in relations:
+        nid += 1
+        pid, _, _ = positions[p] if p in positions else (None, None, None)
+        cid, _, _ = positions[c] if c in positions else (None, None, None)
+        if pid is None or cid is None:
+            continue
+        label = ""
+        if ratio not in (None, ""):
+            label = f"{ratio}%"
+            if note:
+                label += f" ({note})"
+        lines.append(f'<mxCell id="{nid}" value="{label}" style="{STYLE_EDGE}" edge="1" parent="1" source="{pid}" target="{cid}"><mxGeometry relative="1" as="geometry"/></mxCell>')
+    lines.append('</root></mxGraphModel>')
+    return "\n".join(lines)
+
+
+def main():
+    if len(sys.argv) < 2:
+        sys.exit(__doc__)
+    xlsx_path = sys.argv[1]
+    out_path = sys.argv[2] if len(sys.argv) > 2 else xlsx_path.rsplit(".", 1)[0] + ".drawio"
+    relations, companies = read_relations(xlsx_path)
+    if not companies:
+        sys.exit("没有读到任何公司")
+    xml = generate_drawio(relations, companies, xlsx_path)
+    with open(out_path, "w", encoding="utf-8") as f:
+        f.write(xml)
+    print(f"✅ 生成成功: {out_path}")
+    print(f"   公司数: {len(companies)}, 关系数: {len(relations)}")
+    print("   用 drawio 打开该文件即可查看架构图")
+
+
+if __name__ == "__main__":
+    main()