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With the rapid economic development and the increasing energy demand, solar energy as an important part of the renewable energy is taking more and more attention. In this paper, photovoltaic maximum power control strategies have been studied in this context, and MPPT method based on fuzzy variable step is proposed, it makes up the inadequate of traditional methods like perturbation observation method, incremental conductance method, intermittent scanning method and the constant voltage method. Build photovoltaic physics experiment platform, preparation of a variable step size control to achieve program, and simulation and experimental verification that the method can fast-track the changes in the weather, achieve MPPT, it has excellent dynamic and steady-state performance.