Abstract: To accurately predict displacement of surface subsidence in the process of working face advancing and provide the basic data used for surface borehole engineer protection and safety prediction of surface coalbed methane development drilling, we set up the surface ground subsidence time hysteresis parameter based on the workface advance velocity, coal seam depth, surface ground subsidence influence radius which represents the time hysteresis character of different geology and mining methods in different coal mine regions. At the same time, this parameter is introduced to the surface ground subsidence curve function, the surface ground subsidence time function based on surface ground subsidence parameters and workface advance velocity is set up. After the contrast to the surface ground subsidence data in the Xinglongzhuang Coal Mine, the model prediction data were proved to be correct which suggests the surface ground subsidence time function is good in engineer application.