A new photovoltaic array simulator was studied and designed on the basis of a Buck DC converter and the current feedback fuzzy control theory.The output voltage of the Buck converter was measured and used to calculate the current of photovoltaic array engineering mathematics model used as the input reference current of the fuzzy controller.The difference of the reference current and the real-time feedback current of the Buck converter and its rate of change were regarded as two input variables of the fuzzy controller, and then, the duty cycle of the electronic power switch was adjusted with closed-loop fuzzy algorithm to make the output voltage and the current of the simulator work at the anticipant point of the photovoltaic array on the V-I characteristic curve and realize the simulation of photovoltaic properties.A fuzzy controller with TMS320F2812CPU and a triangular fuzzy membership function was used and the domain of the input and output variables limited to ［-3 3］ contained 49 fuzzy rules.Simulation and experiment results have shown that the fuzzy control simulator can not only accurately simulate the static output characteristics of the photovoltaic cell, but can also rapidly realize the dynamic characteristics when the load or the external environment changes, and the approximate error is under 3.6%, the overshoot under 3.5%, the ripple coefficient under 3% and the tracking time about 0.3s.The fuzzy control simulator can work well as PV array experiment equipment for the research and development of photovoltaic systems.