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In the telecommunication operator wireless network, the user is identifiable and centrally managed, therefore the user trust can also be centrally managed. In this paper, we propose trust cloud model based on cloud model to solve the user trust management problems in the operator wireless networks, including the trust collection, storage, evaluation and update. In the trust cloud model, we realizes the conversion between the qualitative concept and quantitative value of trust based on the satisfaction degree, the trust timeliness based on the trust vector buffer queue, the trust evaluation and update based on the backward cloud algorithm of cloud model, and determine the user trust tendency based on the numerical characteristics of cloud model. The trust cloud model proposed by this paper is easy to implement, on the analysis of the general need of the user trust management in operator wireless network, the implementation of prototype system for wireless network's trusted access architecture has realized. This prototype system uses the standard protocol to communicate with the wireless network environment, and the trust service newly added in this prototype system has little influence on the original wireless network, so this prototype system has certain practical application value.