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With the development of application of the peer-to-peer networks, the problem of the privacy preservation has aroused extensive concern. Though many previous researches have focused on the realization of the anonymous communications, these anonymous technologies usually need complex structures which increase the cost of maintenance and the difficulty of management, and prolong the transmission delay. Aimed at the privacy preservation of searching content in P2P network, especially the network without searching server, a concealment searching model based on one-way function and Soundex algorithm is proposed. It can protect searching content of peers and resist attacks of snooping, replay, disguise and so on, meanwhile the model support accurate search and fuzzy search. According to the analysis, this concealment searching model achieves relatively high security as well as searching effectively.