The invention discloses a cloud-rendering file high-speed transmission method based on rendering characteristics. A file checking list forms in a client system, and files which are the same with files in a network storage server are rejected. According to the invention, through file modification time and file size sequencing, a file which needs to be uploaded is searched. While uploading the file, the system begins to calculate Hash characteristic values of the next file. Through sending Hash value contrast to a server side for two times, a to-be-uploaded file, in the a client side, which is the same with files in the server side, is deleted. No computational complexity is increased, and simultaneously the quantity of file uploading can be reduced to the limit, and the total time consuming of file uploading can be reduced. According to the system, the file uploading efficiency is greatly raised; for industry characteristics of frequent uploading and downloading of large files of the rendering industry, storage space of the network server can be saved considerably. Meanwhile, time spent on uploading by clients is reduced.