File download method, system and apparatus

The present invention discloses a method for downloading files, the system and apparatus. Wherein the download method comprising: acquiring unnecessary data in the file to be downloaded; removing the useless data in the file to be downloaded, the compressed file to be downloaded; file to be downloaded and the compressed downloaded into the memory of the terminal device. By the present invention, it can improve the efficiency of file transfer service and the cost of production, prolong the life of the memory of the terminal device.