Recent years, shortwave infrared ( SWIR) imaging system has been developed rapidly, and additional active lighting is very necessary in some scenarios. At present, the uniformities of laser illumination homogenization schemes commonly used are not high, and can't reach the requirements of imaging. A new 25 × zoom laser illumination system was designed based on the analysis of the laser model in fiber and the theory of zoom illumination system. The optical lens of the illumination system is composed of three groups of lenses, and the CAM structure achieves continuous zooming. This system is small in size, has simple structure, and gains large zoom ratio.Finally a continuous change of 2 ～ 50° in illumination angle is achieved. Laser illumination intensity uniformity reaches 92. 7%. In the imaging experiments, the human identify distance was up to 1. 2 km. The continuous zoom laser illumination system is of high significant for improving the ability of the short-wave infrared night vision system.