diff --git a/DLD154Tool/main.py b/DLD154Tool/main.py
index ccf0d56..1468f48 100644
--- a/DLD154Tool/main.py
+++ b/DLD154Tool/main.py
@@ -31,6 +31,7 @@ from protocol_700bs import (
 from protocol_modbus import (
     build_read_input_regs, build_read_holding_regs, build_read_discrete_inputs,
     build_write_single_reg, build_write_multiple_regs, build_report_slave_id,
+    build_reset_mcu,
     parse_response, is_active_report,
     FullDataBlock,
 )
@@ -380,6 +381,11 @@ class TabModbus(QWidget):
         btn_write.clicked.connect(self._write_single)
         hl.addWidget(btn_write)
 
+        btn_reset = QPushButton("复位 MCU (0x0012=0x2C2C)")
+        btn_reset.setStyleSheet("color: red; font-weight: bold;")
+        btn_reset.clicked.connect(self._send_reset)
+        hl.addWidget(btn_reset)
+
         layout.addWidget(gb_write)
 
         # ── 主动上报控制 ──
@@ -458,6 +464,12 @@ class TabModbus(QWidget):
         self.send_request.emit(build_write_single_reg(self._addr(), reg, val))
         self.log_signal.emit(f"[Modbus] FC 0x06 write reg=0x{reg:04X} val=0x{val:04X}")
 
+    def _send_reset(self):
+        if QMessageBox.question(self, "确认", "发送复位 MCU 命令 (HR 0x0012=0x2C2C)?",
+                                QMessageBox.Yes | QMessageBox.No) == QMessageBox.Yes:
+            self.send_request.emit(build_reset_mcu(self._addr()))
+            self.log_signal.emit("[Modbus] 发送复位 MCU 命令 (HR 0x0012=0x2C2C)")
+
     def _toggle_auto_report(self, checked: bool):
         self._auto_report_enabled = checked
         val = 1 if checked else 0
diff --git a/DLD154Tool/protocol_modbus.py b/DLD154Tool/protocol_modbus.py
index c50a580..8e74a79 100644
--- a/DLD154Tool/protocol_modbus.py
+++ b/DLD154Tool/protocol_modbus.py
@@ -111,6 +111,11 @@ def build_report_slave_id(addr: int) -> bytes:
     return build_request(addr, 0x11, b'')
 
 
+def build_reset_mcu(addr: int) -> bytes:
+    """FC 0x06 — 写 HR 0x0012=0x2C2C 复位 MCU"""
+    return build_write_single_reg(addr, 0x0012, 0x2C2C)
+
+
 # ══════════════════════════════════════════════════
 # 响应解析
 # ══════════════════════════════════════════════════