diff --git a/history/003_trap/src/main/java/com/github/drinkjava2/frog/objects/Trap.java b/history/003_trap/src/main/java/com/github/drinkjava2/frog/objects/Trap.java
new file mode 100644
index 0000000..0b7fc68
--- /dev/null
+++ b/history/003_trap/src/main/java/com/github/drinkjava2/frog/objects/Trap.java
@@ -0,0 +1,56 @@
+/* Copyright 2018-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by
+ * applicable law or agreed to in writing, software distributed under the
+ * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
+ * OF ANY KIND, either express or implied. See the License for the specific
+ * language governing permissions and limitations under the License.
+ */
+package com.github.drinkjava2.frog.objects;
+
+import static com.github.drinkjava2.frog.Env.ENV_HEIGHT;
+import static com.github.drinkjava2.frog.Env.ENV_WIDTH;
+import static com.github.drinkjava2.frog.Env.bricks;
+
+import com.github.drinkjava2.frog.Frog;
+
+/**
+ * Trap will kill all frogs inside of it, if frog's position has material and
+ * it's not food, frog will die
+ * 
+ * @author Yong Zhu
+ * @since 2019-08-05
+ */
+@SuppressWarnings("all")
+public class Trap implements Object {
+	private static final int X1 = ENV_WIDTH / 2 - 350 / 2; // 陷阱左上角
+	private static final int Y1 = ENV_HEIGHT / 2 - 20 / 2; // 陷阱左上角
+	private static final int X2 = ENV_WIDTH / 2 + 350 / 2; // 陷阱右下角
+	private static final int Y2 = ENV_HEIGHT / 2 + 20 / 2; // 陷阱右下角
+
+	@Override
+	public void build() {
+		for (int x = X1; x <= X2; x++)
+			for (int y = Y1; y <= Y2; y++)
+				bricks[x][y] = Material.TRAP;
+	}
+
+	@Override
+	public void destory() {
+		for (int x = X1; x <= X2; x++)
+			for (int y = Y1; y <= Y2; y++)
+				bricks[x][y] = 0;
+	}
+
+	@Override
+	public void active(int screen) {
+
+	}
+
+	public static boolean inTrap(Frog f) {
+		return f.x >= X1 && f.x <= X2 && f.y >= Y1 && f.y <= Y2;
+	}
+
+}