Because of the low utilization of solar energy and the high cost of photovoltaic power, Fresnel lens were used to focus sunlight from the point of concentrator.On the basis of the analysis of the structure of Fres-nel lens, the evaluation indexes of the lens were put forward and a1000mm diameter Fresnel lens which can meet the demands was designed, the location of the lens when it concentrates light was also discussed.The de-sign has a certain universal, which can be applied to other large diameter Fresnel lens design, it is important to promote the development of solar energy collection.