Based on the research sample of WeChat users with heaviest and intermittent discontinuance behavior, the paper used the "situational experiment", and "depth interview" to obtain text information, then the open coding, axial coding and selective coding were used to extract four major affecting factors such as cognitive factors, emotional factors, contextual factors and individual factors and construct a theoretical model for the formation mechanism of intermittent discontinuance behavior. "Cognitive Factors - Emotional Factors - Behavioral Results" is the mainline process of the formation mechanism of users’intermittent discontinuance behavior in mobile social network, individual factors and
contextual factors play a role of moderate or direct influence. The combination of reducing negative use efficiency, increasing conversion costs, establishing a dynamic detection system for intermittent discontinuance behavior, and making personalized management schemes can reasonably and efficiently suppress intermittent discontinuance behavior and increase users’loyalty.