Abstract: Laser guidance is one of the most commonly used guidance methods nowadays, and the performance of laser semi-active optical system directly affects its guidance accuracy. The method for the aberration optimization design of laser semi-active optical system was discussed, the initial structure of the optical system was realized by giving different spherical aberration and defocus values, and the spot uniformity design was realized by controlling the asymmetric aberration. A refractive laser semi-active lens was designed and fabricated, in 1064 nm working wavelength, with ± 9.2° field of view, 5 mm spot size, uniform energy distribution. In order to solve the problem that laser semi-active lens can not be detected separately, the principle of a low-cost visual testing of lens was proposed, which based on the chromatic aberration characteristics, and the visual testing system for laser semi-active optical lens was built. Test results of the lens show that the spot size satisfies the design requirements, and the low-cost visual testing system significantly improves the efficiency of lens testing and is easy to engineering and mass-produce.