Network message management method of intelligent substation process layer switch

The invention discloses a network message management method of an intelligent substation process layer switch. The method comprises the following steps: adding FPGA between the switch and PHY, a switch CPU sending a message management strategy to the FPGA, and realizing the network message management of the switch through the FPGA; the FPGA checking legality of network messages through network message key words, and processing the illegal messages according to the message management strategy; the FPGA counting traffics of different network messages according to the network message key words, and processing the message with overrun traffic according to the message management strategy; the FPGA checking correctness of the legal network message, precisely positioning the error message according to the network message key word, and processing the abnormal message according to the message management strategy. The problem that the network message at the intelligent substation cannot be precisely inhibited is solved, the hidden danger that a network storm is capable of forming on a communication network of the intelligent substation is eliminated.