Considering the problems of traditional maximum power point tracking(MPPT) methods for PV array such as system oscillation and low efficiency, the new MPPT control strategy combined constant voltage tracking with adaptive duty ratio perturbation method is proposed. Moreover, the implementation process of this method is analyzed, while the Matlab simulation model of photovoltaic array and PV systems is established. Through comparison and analysis of two kinds of control strategies and evaluation on tracking performance under different light intensity and environment temperature, it is concluded that each algorithm has advantages and disadvantages. Finally, the correctness of the proposed control strategy is verified by experiment. The experimental results also prove that the new control strategy improves the fast tracking performance and stability of the system.