Abstract: With continuous improvement of traditional agricultural technology, scale of “five in one”greenhouse planting and breeding has been further expanded, and power consumption of large-scale greenhouse groups has increased sharply．It is an urgent problem to study power supply technology of renewable energy greenhouse groups．Taking optical storage small power supply system as research object, a simulation model of light storage power supply system of mountain greenhouse group in Hotan Region of Xinjiang was built．According to power consumption law of greenhouse group and regional peak sunshine hours, installation capacity and model of photovoltaic array, circuit configuration, charge and discharge circuit of energy storage system and other parameters were set．Working principle of photovoltaic cells, maximum power tracking point control and charge discharge control strategy of energy storage system were studied in detail．And simulation model was built in simulation software of Matlab/Simulink to verify effectiveness of light storage and power supply system model of mountain greenhouse group．Research results provided theoretical reference for subsequent construction of hardware for power supply system of greenhouse clusters．