Enhancing the efficiency of the file location is important in the study of unstructured P2P network. Flooding and random walks are simple and easily implemented. However, the former will increase the load of P2P network to much and put bounds to the search depth, and the latter’s lower network load and deeper search comes at the cost of lower search breadth and more response time. This paper puts forward a strategy of content location and routing of a search request in an unstructured P2P network. By applying the rationale of social network and simulating the ability of the peers of social network, the strategy proposed in this paper, can make better use of the ability of the peers and locate files faster with lower search depth and breadth. Supported by the equivalent hardware environment, the experimental results demonstrate that the time spent on content location can be reduced by more than 50%.