In order to study the focusing and imaging performance of Angel lobster eye X-ray micro pore optic lens, the numerical model of the X-ray in the square channel is established based on X-ray reflection principle and rotating coordinate system. By solving the intersection, the transmission path of all the rays is obtained. In order to verify the accuracy of the model, the focal length and transmission efficiency of the lens are both simulated and tested. At the focal length of 365 mm, the reflected X-rays are focused into cross line, and the center focal spot intensity is the largest, which is consistent with the simulation results. As for the transmission efficiency of the lens before and after coating Ir, the simulation results are 1.23% and 9.18%, respectively, at the energy of 4.5 keV. Accordingly, the experimental results are 1.44% and 10.14%, respectively, which is consistent with the above data. The results show that the numerical model is reasonable and provides the theoretical and simulation basis for the fabrication of the lens.