A SNR weighted-consensus based cooperative spectrum sensing algorithm was proposed on the basis of the distributed average consensus-based cooperative spectrum sensing algorithm. The algorithm incorporates weights reflecting users’ SNR into the average consensus and the weights are obtained based on the converged average consensus. Without any SNR knowledge, the algorithm enables effective weighted-consensus of the spectrum sensing information in distributed . Both the analysis and simulation indicate that the proposed algorithm can over the inability to distinguish the diversity on users’ SNR of the average consensus-based algorithm, as well as improve the performance of spectrum sensing.