According to the difficulties in the establishment of precise mathematical model for photothermal high-power dish solar power station concentrator grid, and the urgent need for a precise analysis results, ANSYS finite element model for 25 kW dish solar power station concentrator grid was constructed, based on the model, checking analysis for concentrator grid was done on the strength characteristics under normal operating condition and structure checksum load. Stress and deformation cloud picture and a serious important conclusion gained were as follows. Firstly, in normal working conditions, the weight of the grid have great impact on its deformation, deformation increases gradually with the increases of grid altitude angle, and when the altitude angle is 90°, the degree of deformation reaches maximum value of 61mm. Secondly, concentrator grid structure meets the demands under the structure check load. The study provides theoretical basis for the testing and optimization of concentrator grid.