With the wide application of infrared imaging equipment in military and civilian fields, how to judge the technical status of infrared imaging equipment quickly and consistently as well as analyze and solve problems becomes more and more urgent. In this paper, a portable infrared target simulator based on zoom dual-band is proposed. Through the design of high-precision blackbody (accuracy: better than 001℃ during -10℃ and 260℃), card insertion and pull-out target, and 3×continuous zoom dual-band projection structure, the detection requirements of infrared imaging equipment are met. Compared with other simulators, the simulator takes into account two bands and improves the application range of the equipment. In addition, the replaceable target and zoom projection are conducive to taking into account the simulation detection requirements of different infrared imaging equipment at different distances. According to the test results, the expected goal is achieved, the practical simulation test demand is realized, and the problem of high cost is solved.