Abstract: For the wireless communication environment characteristics of many turnouts and long tunnels in coal mine.This paper proposes a kind of distributed cooperative spectrum sensing algorithm based on clusters.This algorithm selects the biggest node of SNR in each tunnel branch as the head,and spectrum sensing is done anmong clusters in a distributed cooperative way.The simulation results show that this algorithm not only can enhance the detected probability of low SNR,but also can improve the safety of cooperative spectrum sensing.