Cassegrain and similar Cassegrain optical lenses are widely used in photoelectric equipment. In order to study the special laser reflection characteristics of cat eye effect of photoelectric equipment with Cassegrain optical lens, reflection model of Cassegrain lens is established using the ZEMAX software. By the method of physical optics propagation, the reflection characteristics of cat eye effect are simulated and analyzed, and the range of incidence angle in which cat eye effect could be detected is obtained. In the experiment, a Cassegrain lens is irradiated by laser, the images of cat eye effect reflection light are obtained,and the absolute reflectivity of cat eye effect and the divergence angle of the reflection light are tested. The results show that the reflection light of cat eye effect can be detected when the expanding system is placed in the field-view of the Cassegrain lens. The center shelter leads to the decrease of the center energy at the return place. The absolute reflectivity of cat eye effect is 11.48%, the divergence angle of the reflection light is 3.3 mrad, so a detection with distance of 30 km can be easily achieved.