Based on the output characteristics of photovoltaic (pv) battery and the analysis of MPPT control the.ory, a model of MPPT control system with pv power generation of Boost circuit is researched. The operation princi.ples of each sub-module in the model are analyzed. And the simulation model of the whole system is built by Simu.link software. Taking photovoltaic array STP0950S-36 as an example, the simulation verifies that the maximum pow.er tracking can be well realized by MPPT control system and the changes of exterior environment can be respondedquickly and the efficiency of photovoltaic power generation can be improved effectively.