File storage device capable of preventing files from being damaged

The utility model provides a file storage device for preventing file damage, which comprises a cabinet body, the bottom of the cabinet body is connected with the top of a base, the interior of the cabinet body is divided into three file storage areas by two supporting plates which are horizontally arranged, the top of each supporting plate is horizontally provided with a containing groove, a threaded rod is arranged in each containing groove, and the threaded rod is connected with the top of the base. One end of each threaded rod penetrates through the side face of the cabinet body and extends to the outer side to be connected with the output end of a motor, the outer ring of each threaded rod is sleeved with a movable plate, a groove is formed in one side of each movable plate, a position sensor is arranged in each groove, and the front end of each supporting plate is connected with a baffle through a hinge; a partition plate is vertically arranged in the file storage area at the bottom of the cabinet body,