The embodiment of the invention discloses a video processor comprising a video input processing device, a video output processing device, a master control device and a backboard device. The backboarddevice comprises a matrix switching module, a video input processing device connecting port, a video output processing device connecting port, a master control device connecting port, an extension device connecting port and a programmable logic device. The programmable logic device is connected with the master control device connecting port and the extension device connecting port and connected with the video input processing device connecting port through a first ethernet physical layer transceiver group and connected with the video output processing device connecting port through a second ethernet physical layer transceiver group. The invention also discloses a backboard communication method. The communication rate can be enhanced and point-to-point communication can be realized.