Abstract: A method for synchronizing a file, comprising the following steps: a step for receiving a synchronously uploaded file, dividing the content of said uploaded file into a head portion, and a rest portion and producing corresponding files which are respectively corresponding to said head portion and said rest portion by means of a server; a step for downloading said corresponding files which is corresponding to said head portion of the content of each said uploaded file to a terminal by means of said server; a step for downloading said corresponding files which is corresponding to said rest portion of the content of each said uploaded file to said terminal, and combining said corresponding files which is corresponding to said rest portion with said corresponding files which is corresponding to said head portion by means of said server.