Application program version updating method and device

The invention discloses an application program version updating method and device, and the method comprises the steps: obtaining a first list file of a first version file corresponding to a to-be-updated application program, and arranging the file information of each file in the first list file from large to small according to the file modification date; and sequentially comparing the file representation information in the first list file with the file representation information in the second list file of the second version file according to the sequence recorded by the first list file. And when the file representation information of the current file in the first list file is compared, querying the file representation information of a target file located in the same file path as the current file from the second list file, and comparing the file representation information of the current file with the file representation information of the target file. And if the current file does not change relative to the tar