Data transmission method based on symmetric encryption

The invention discloses a data transmission method based on symmetric encryption, and belongs to the technical field of data transmission. The data transmission method based on symmetric encryption comprises the following steps: acquiring a data transmission path set between a server and a client; acquiring a data transmission demand in a data transmission process; obtaining an encryption key of each data transmission path according to the data transmission path set by using the data transmission demand; encrypting data to be transmitted according to the encryption key to obtain encrypted data; and completing data transmission by using a data transmission path set according to the encrypted data. The to-be-encrypted data is divided according to the data transmission requirement of the client to obtain the encrypted data, the client can only derive partial data in the to-be-encrypted data of the client and cannot check all the data, and the security of the server data is ensured on the basis that the algorithm