Security protection system for data transmission and protection method thereof

The invention discloses a security protection system for data transmission and a protection method thereof, relates to the technical field of data transmission security protection systems, and aims to solve the problems that in the existing data transmission process, data encryption measures are simple and mainly adopt a simple authentication mode, so that the data is easy to crack in the internal transmission process, and the security of the data transmission is influenced. And unnecessary loss is brought to enterprises. The safety protection system comprises a control end device, a sending end device and a receiving end device, the control end device is bidirectionally and electrically connected with the sending end device and the receiving end device, and the output end of the sending end device is electrically connected with the input end of the receiving end device; the control end device comprises a control end transceiver module, a screening module, a password generation module, a comparison module, an