Abstract: For making data fusion efficiently, the method of multisource data fusion of spectrum resources based on complex network of opinion formation theory is proposed. The method uses multiple monitoring node spectrum resource assessment information to integrate, evaluate the spectrum resource usability, and provide status messages for dynamic spectrum management of spectrum resources. According to the simulation of different node number of the network, it shows that the integration time is reduced by 50% on the basis of opinion of formation theory by setting the backbone nodes, and, it costs no more than 30 rounds of communication interaction in the case of no more than 100 network nodes to achieve data fusion of the multiple nodes in the core area.