diff --git a/download-apt.py b/download-apt.py
new file mode 100644
index 0000000..fb79737
--- /dev/null
+++ b/download-apt.py
@@ -0,0 +1,64 @@
+#!/usr/bin/python
+# -*- coding: UTF-8 -*-
+#==================
+# Author: Alvis Zhao
+# Date: 2020-08-14 11:45:09
+# LastEditTime: 2020-08-14 11:51:17
+# Description: 下载ubuntu deb软件及其依赖包
+#==================
+
+import os
+import sys
+
+def showUsage():
+    print("Usage:")
+    print("    python download-apt.py net-tools")
+
+def getDepends(pkg):
+    dependList = []
+    cmd = 'apt-cache depends ' + pkg + ' | grep Depends |cut -d: -f2 |tr -d "<>" | sort | uniq'
+    pipeline = os.popen(cmd)
+    items = pipeline.read().split("\n")
+    for item in items:
+        if len(item) > 0:
+            dependList.append(item)
+    return dependList
+
+def main():
+    if len(sys.argv) < 2:
+        print("用法错误!")
+        showUsage()
+        return
+
+    pkgAll = []
+    pkg = sys.argv[1]
+    outputDir = pkg
+    pkgAll.append(pkg)
+
+    os.popen('mkdir -p ' + outputDir)
+    # dependList = getDepends(pkg)
+    # pkgAll = pkgAll + dependList
+    # 递归深度
+    depth = 3
+    count = 0
+    tempList = []
+    tempList.append(pkg)
+    while (count < depth):
+        count = count + 1
+        itemDepends = []
+        for item in tempList:
+            dependList = getDepends(item)
+            itemDepends = itemDepends + dependList
+        pkgAll = pkgAll + itemDepends
+        tempList = itemDepends
+
+    # 先将列表转化为set，再转化为list就可以实现去重操作
+    pkgAll = list(set(pkgAll))
+    os.chdir(outputDir)
+    for item in pkgAll:
+        # download deb package
+        print("  downloading " + item)
+        os.popen('apt-get download ' + item)
+
+if __name__ == '__main__':
+    main()