Distribution automation message monitoring device

The invention discloses a power distribution automation message monitoring device, and the device comprises an industrial personal computer, a network port mirror image switch, a serial port analyzer and a network port analyzer, wherein the industrial personal computer is connected with remote signaling equipment in a power distribution site; for remote signaling equipment capable of carrying out network port mirroring, a communication port of each piece of remote signaling equipment is transmitted to the industrial personal computer through a network port mirroring switch, and the network port mirroring switch carries out message transmission monitoring on the communication port of each mirroring access; for remote signaling equipment which cannot be subjected to network port mirroring, each peice of remote signaling equipment is accessed to the industrial personal computer, and a serial port analyzer and a network port analyzer are arranged in the industrial personal computer and are used for respectively m