Training data processing method and device, server and medium

The embodiment of the invention is suitable for the technical field of data processing, and provides a training data processing method and device, a server and a medium, and the method comprises the steps: determining an application server transmitting a training request when the training request is received; if the application server is an external network server, packaging first data corresponding to the training request into an encrypted data packet, wherein the security level requirement of the first data is lower than the actual requirement of the training request, and the encrypted data packet has a corresponding decryption key and a validity period; sending the encrypted data packet to the external network server; and when the deadline of the validity period arrives, sending a data processing instruction to the external network server to indicate the external network server to delete the encrypted data packet. By adopting the method, the application range of the training data can be expanded, and the s