The invention relates to a power distribution communication network wired link and wireless link mutual backup linkage method and system and an air-ground mutual backup integrated device. The method comprises the following steps that a detection message is sent to the opposite equipment in a power distribution communication network; and if a response signal generated by the opposite equipment according to the detection message is not received within the preset period of time, the data are transmitted to the opposite equipment through the wireless link. The state of the wired link is monitored by using the end-to-end detection technology, and transmission of the service is switched to the wireless link when the wired link is interrupted so that backup of optical fiber wired network and LTE wireless network communication can be realized.