The invention discloses a file storage method, a file downloading method, a file processing method, file management equipment and a readable storage medium. Due to the fact that an extranet node has the extranet IP, a file slice can be directly uploaded to the extranet node, and the extranet node can rapidly diffuse the file slice in the whole decentralized network through diffusion. In addition,compared with a target file, the file slice has the advantages of small data volume and higher uploading success rate. After the file slice is uploaded to the extranet node, a first-level index and asecond-level index are stored, so that the target file can be conveniently positioned, namely, which extranet node stores the file slice of the target file is determined. Namely, in the application, the target file can be sliced and then uploaded, and the file slice of the target file after the slice is found by positioning can be quickly downloaded, so that the uploading speed and the downloadingspeed of the file can be improved.