Efficient filtering method and device based on double CAN buses of vehicle

The invention relates to an efficient filtering method and device based on double CAN buses of a vehicle. The method comprises the following steps that each message sending node sends a message to a message target node in a network through a master network and a slave network of the double CAN buses; the messages sent by the master network and the slave network at the same time carry the same user data, comprise CAN IDs corresponding to the message sending nodes, and are respectively filled with feature numbers corresponding to the master network and the slave network; a message target node receives messages through a master network and a slave network respectively, and after hardware filtering is independently carried out, the messages sent by the master network and the slave network with the message target node as a target are put into a cache queue array; and the messages in the buffer queue array is filtered according to the CAN ID and the feature number in the messages, and the messages with repeated use