diff --git a/list.md b/list.md
index 58e2329..e6efd6d 100644
--- a/list.md
+++ b/list.md
@@ -37,7 +37,7 @@
 - [x] `14. Fixing` - `src/source/TetrisLogic.cpp`
 - [x] `17. GameOver` - `src/source/TetrisLogic.cpp`
 - [x] `18. ComputeTarget` - `src/source/TetrisLogic.cpp`
-- [ ] `19. Restart` - `src/source/TetrisLogic.cpp`
+- [x] `19. Restart` - `src/source/TetrisLogic.cpp`
 
 ## 第五阶段：消行与得分逻辑
 
diff --git a/report/code-snippets/Part4/RestartAfter.png b/report/code-snippets/Part4/RestartAfter.png
new file mode 100644
index 0000000..7a07455
Binary files /dev/null and b/report/code-snippets/Part4/RestartAfter.png differ
diff --git a/report/code-snippets/Part4/RestartBefore.png b/report/code-snippets/Part4/RestartBefore.png
new file mode 100644
index 0000000..81022a1
Binary files /dev/null and b/report/code-snippets/Part4/RestartBefore.png differ
diff --git a/src/source/TetrisLogic.cpp b/src/source/TetrisLogic.cpp
index a3a7dee..1962bc4 100644
--- a/src/source/TetrisLogic.cpp
+++ b/src/source/TetrisLogic.cpp
@@ -360,7 +360,34 @@ void ComputeTarget()
     point = originalPoint;
 }
 
+/**
+ * @brief 重置整个游戏状态，开始新的一局。
+ *
+ * 该函数会清空工作区中的所有固定方块数据，重置分数、结束标记和暂停标记，
+ * 并重新初始化当前方块、下一方块、旋转状态以及生成位置。
+ * 最后会重新计算一次当前方块的预测落点。
+ */
 void Restart()
 {
-    // TODO(作业19): 重置游戏状态。
+    for (int i = 0; i < nGameHeight; i++)
+    {
+        for (int j = 0; j < nGameWidth; j++)
+        {
+            workRegion[i][j] = 0;
+        }
+    }
+
+    tScore = 0;
+    gameOverFlag = false;
+    suspendFlag = false;
+    targetFlag = true;
+
+    type = rand() % 7;
+    nType = rand() % 7;
+    state = 0;
+    point.x = 3;
+    point.y = 0;
+    target = point;
+
+    ComputeTarget();
 }