A dry-type air-core reactor overheating fault early warning system based on TVOC and temperature test provided by the invention comprises: two or more than two wireless TVOC gas sensors which are arranged at the outer surface of the envelopment of the dry-type air-core reactor; two or more than two wireless temperature sensors which are arranged at the outer surface of the envelopment of the dry-type air-core reactor; a wireless gas data acquisition device which is connected with the two or more than two wireless TVOC gas sensors through a wireless network, the two or more than two wireless temperature sensors being connected with the wireless gas data acquisition device through the wireless network; a wireless temperature data acquisition device; a remote client which is connected with the wireless temperature data acquisition device and the wireless gas data acquisition device; and an alarm system which is connected with the remote client. The dry-type air-core reactor overheating fault early warning system based on the TVOC and the temperature test is able to perform real-time on-line automation monitoring of the overheating condition of the dry-type air-core reactor, and has higher accuracy and precision.