Redundant industry Ethernet system with message multistage filtering function and service classification control function

The invention discloses a redundant industry Ethernet system with a message multistage filtering function and a service classification control function. The redundant industry Ethernet system is characterized by including two ways of MAC message processing units, a dual-network redundancy unit, a message filtering processing unit and a message classifying forwarding unit by means of an FPGA; the two ways of MAC message processing units are used for receiving and sending messages, and the messages are transmitted to the rear-stage dual-network redundancy unit to be processed after being received; the dual-network redundancy unit receives the messages which arrive firstly, discards the messages which arrive afterwards and transmits the messages to the message filtering processing unit; the message filtering processing unit conducts multistage filtering on the received messages and transmits the messages to the message classifying forwarding unit; the message classifying forwarding unit selects different data transmission channels according to the message types, the messages are transmitted to different CPU systems, and the different data messages are processed. According to the redundant industry Ethernet system, the processing workload of unrelated messages of the CPU systems is greatly reduced, and the stability and reliability of operation of the whole system are ensured.