High-reliability optical fiber microwave link backup transmission equipment

The invention relates to a high-reliability optical fiber microwave link backup transmission device in the field of data transmission. The system is realized by connecting four switches and two microwave communication devices, the switches at the two ends of the system are respectively connected in pairs through main optical fiber links, and wireless backup and wired backup of the main optical fiber links are realized through microwave links and standby optical fiber links which are connected in a cross manner. On the premise of ensuring high working reliability, the equipment scale in the system can be greatly reduced, and the system cost is reduced.