Multi-interface encryption transmission device applied to highway electromechanical system

The utility model discloses a multi-interface encryption transmission device applied to a highway electromechanical system, comprising a POE module and a conversion module, one side of the POE module close to the conversion module is provided with a first ETH interface and a first DC interface, one side of the POE module far away from the conversion module is provided with a POE interface, and the conversion module is provided with a second ETH interface and a second DC interface. One side, close to the POE module, of the conversion module is provided with a second ETH interface and a second DC interface, one side, far away from the POE module, of the conversion module is provided with a third ETH interface, two sides of the third ETH interface are respectively provided with a plurality of conversion interfaces, and the bottom of the conversion module is provided with a supporting mechanism. The POE module and the multi-port encryption conversion module are arranged, so that interfaces of the encryption devic