For photovoltaic cells general simulation model is complex and difficult problems, this article is based on the Matlab/simulink module encapsulation technology,put forward a kind of several important parameters in the photovoltaic cell modular encapsulation of new simulation model,the model is simple,clear and can be clear for different temperature and light intensity on the influence of photovoltaic battery parameters.And combined with the new method of tracking MPPT,judging by dU×dP,system in the external environment changes,just after two judgment can accurately get system working position, fast track to the maximum power point.Finally under the environment of Matlab/simulink simulation of this model not only can accurate reduction of photovoltaic cells I-U characteristic curve,through combination with new tracking methods,significantly shortened the time of tracking system,weaken the oscillation phenomena of the system in the maximum power point.