Practical file storage box

The utility model discloses a practical file storage box which comprises a file body, a first fixing plate is fixedly connected to one side of the interior of the upper portion of the file body, two stopping blocks are fixedly connected to the inner end face of the first fixing plate, a clamping groove is formed between the two stopping blocks, and small clamping grooves are formed in the inner end faces of the stopping blocks. A second fixing plate is fixedly connected to the other side of the interior of the upper portion of the file body, a clamping block matched with the clamping groove is fixedly connected to the inner end face of the second fixing plate, and small buckles matched with the small clamping grooves are fixedly connected to the end faces of the two sides of the clamping block. The inner side wall of the file body is provided with the clamping groove which is mutually clamped with the clamping block, and the small buckle is inserted into the small clamping groove, so that the interior of the