The influence of Gaussian beam on photovoltaic cells output is researched for researching big influence of laser power density distribution feature on photovoltaic cells output. Establish laser radiation photovoltaic cells output feature test system, introduce test method and test process, research photovoltaic cells output feature in different Gaussian beam position, acquire influence of photovoltaic cells distribution mode on output I-V curve, P-V curve, photovoltaic conversion efficiency and so on in Gaussian beam. The test results show that: radiation shape distribution can acquire better output efficiency, and conclusions can be applied to the laser output can provide a reference.