lmproving the power generation efficiency of photovoltaic batteries has always been the focus ofscholars' researeh.The MPPT technology guarantees that the photovoltaie power generation system continues towork near the maximum power point , thereby improving the efficiency of power generation. Ffaced with themulti-peak phenomenon of the P-U curve under uneven light ,it is diffieult for the traditional MPPT algorithmto find the maximum power point GMPP , which is easy to fall into the local peak point LMPp.In response tothe above problems , the simulation model of Simulink software is used to study the output characteristies of thephotovoltaic array under uneven light.It is hoped that the study will help and inspire the MPPT algorithm andthe arrangement of the photovoltaie array.