The utility model relates to a multi -functional backpack, cover cover fillet, knapsack base, zipper puller, end and open pulling -on piece, braces and draw zipper head to cover the piece including knapsack upper cover, handle, last zip fastener, zip fastener, storehouse upper end fixedly connected with key link in the knapsack upper cover, key link below is equipped with receipt invoice storage port bag, receipt invoice storage port bag left end is equipped with glasses and hangs the area, the storehouse lower extreme is equipped with debris and places the pocket in the knapsack upper cover, debris are placed and are equipped with the pen on the pocket lateral wall and hang an area and a card slot, knapsack upper cover top fixedly connected with handle, go up the zip fastener along last fixedly connected with in the knapsack upper cover, upward the zip fastener upper end is equipped with the zip fastener and covers cover fillet, knapsack upper cover bottom fixedly connected with knapsack base, it places the pocket to be equipped with notebook computer in the knapsack base, notebook computer places pocket top and is equipped with the panel computer and places the pocket. The utility model discloses simple structure, the practicality is strong, is fit for using widely.