In order to improve the efficiency of the photovoltaic power generation, this paper analyzed the photovoltaic maximum power point tracking control system principle, choosed the hardware circuit to achieve maximum power tracking. According to the nonlinear characteristics of photovoltaic cells output, fuzzy control is put forward to the application of photovoltaic power generation MPPT(maximum power point tracking) control, the fuzzy controller is designed; and under the condition of the normal illumination and the disturbance of light intensity observed output voltage waveforms of fuzzy system and P&O system by simulation experiment. Through comparison and analysis of waveforms proved that the fuzzy MPPT control system has faster response speed, better stability and stronger antijamming ability.