In order to improve the concentration efficiency of optical concentration system,an outdoor concentration test system was disigned.The second order Fresnel concentration system was chosen as the test object,and its performances were tested by localized measurement.Using Tracepro software,transmittance,concentration efficiency and concentration spots of the concentration system were simulated.The second order Fresnel concentration system was experimentally tested by outdoor concentration system. Compared the simulation result with experiment result,it was found that the spots uniformity of the two systems are close,and transmittance differences and differences between concentration efficiencies are 1.800% and 4.346% respectively.The differences of concentration efficiencies mainly come from the manufacturing error and measuring error.So this experimental data can provide information and feedback for the designer and manufacturer of the system to improve the processing technology and raise the concentration efficiency.