The invention discloses an abnormity judgment method based on a GOOSE dual-network receiving mechanism, and the method comprises the steps: 1, carrying out the processing of GOOSE network storm, carrying out the statistics of GOOSE frames in each second, judging whether a network storm exists or not, filtering a storm message through a CRC filtering method, and guaranteeing the transmission of a normal GOOSE frame; Step 2, processing GOOSE abnormal messages, carrying out independent statistics through abnormal judgment of StNum and SqNum of the GOOSE messages in each network to select correctGOOSE messages, and if the two networks are abnormal at the same time, considering to carry out side restart or network frame loss, and receiving message updating data; And step 3, processing different-source data, and judging whether the different-source data caused by configuration errors exist on the network or not by counting GOOSE heartbeat messages. The method timely discovers abnormity, informs operation and maintenance personnel, and gives a solution.