The invention discloses a method for the quick-speed and safe distribution of the file based on the P2P,including that: a, a proclaimed file is in the symmetric encrypting to form an encrypted file before being distributed and transferred, and the encrypted file is made into a seed file, which is placed in the service end and distributed in the P2P way; b, the customer end logins according to the user information, the seed file is selected and downloaded in the P2P way, then the customer is in the identity verification; c, the service end distributes the encryption key of the encrypted file for the certificated customer; d, the customer end obtains the proclaimed file through the symmetric deciphering of the encryption key and the encrypted file. The invention also discloses a system for the quick-speed and safe distribution of the file based on the P2P, comprising a service end and a customer end, wherein the service end comprises a data-base, a seed file list server, a P2P download tracking server and a file uploading server, the customer end comprises a seed file reading module, a P2P downloading module and a deciphering module. The method can satisfy the requirement for safely and quickly distributing and transferring the file under the certain condition.