The non-uniform illumination distribution on the solar cell will reduce the solar-to-electric power conversion efficiency and decrease the service life of the cell in concentration photovoltaic system. Moreover, the hot-spots formd on the cell surface will quickly break the cell. Based on multifocal method, we design the ring-shaped-focus Fresnel concentrator, in which each ring of the Fresnel lens has one focus. Taking a Fresnel concentrator whose diameter is 400 mm, ring number is 200 and focused spot radius is 20 mm as an example, under simulated sunlight, using Tracepro software we get an illumination diagram with energy uniform by distributed on the round surface. The optical efficiency is 85.24% and the homogenization is 0.8. The annular focal spot Fresnel concentrator holds higher light utilization and illumination uniformity. Moreover, when the F number is fixed, the focal spot uniformity gradually reduces with the increase of the concentrator diameter.