Optical fiber communication transmission equipment and signal transmission method thereof

The invention discloses optical fiber communication transmission equipment and a signal transmission method thereof. The transmission equipment comprises a main Ethernet switching module, an auxiliary Ethernet switching module, a cross control module, a main optical interface module, an auxiliary optical interface module and a PC network management module, the main Ethernet switching module is connected with the main optical interface module through the cross control module, and the auxiliary Ethernet switching module is connected with the auxiliary optical interface module through the cross control module to form a transmission channel for transmitting Ethernet signals; the main Ethernet switching module and the auxiliary Ethernet switching module respectively comprise a first external port; and the cross control module is used for cross-transmitting the transmission path of the Ethernet signal in the channel according to the cross command sent by the PC network management module. The reliability of the opti