Remote train network communication interface testing method

The invention provides a remote train network communication interface testing method, and relates to the field of train communication interface testing, and the method comprises the steps that all subsystems build corresponding industrial network testing environments according to respective equipment environment requirements; the industrial network and the train network control system corresponding to each subsystem are respectively accessed to a public network gateway through nodes, and all the nodes establish a virtual local area network in the public network through respective gateways to perform data transmission; any node receives data sent by other nodes for judgment and filtration, and data conforming to a system corresponding to the node is obtained; all the systems send signals toeach other, the test communication interface builds an industrial network test environment by itself through all the subsystems, then accesses the public network through the main node and is matchedwith the train network con