Communication system with CAN and Ethernet sharing RJ45 switching

The utility model discloses a CAN and Ethernet shared RJ45 switching communication system, which comprises at least one dual-network-port module, two network ports of the dual-network-port module are connected through a relay, a control end of the relay is connected with a system main controller, the system main controller is connected with a switch and/or a CAN bus of the system, and the switch and/or the CAN bus of the system are/is connected with the dual-network-port module. And the system main controller is provided with an Ethernet detection module and controls the corresponding relay to be switched off or switched on according to the Ethernet networking state of the dual-network-port module. According to the scheme, the Ethernet can flexibly switch modes, CAN communication is carried out through the network cable, the more stable transmission capacity of the network cable is utilized, the influence of clutters generated by various power sources on the CAN communication is overcome, and the stability of