In light of the miniaturization and portability demand for test equipment of infrared system, the basic composition of test equipment was analyzed, as well as the key parts for miniature design.The design of infrared collimator was optimized by optimizing the design parameters, adopting the optical path design of off-axis parabolic multiple reflections, and selecting duralumin as the machining material of lens, which effectively reduces the volume of optical path system as well as the weight of infrared collimator.A small high-effective black-body radiation source structure was constructed by using red copper radiant surface, thermoelectric refrigerator, cooling fins, etc., and a temperature-controlled driving circuit was designed, realizing the small lightweight surface source black-body.Overall weight of the test equipment developed is less than 15 kg, which realizies the goal of miniaturization and portability with desired application effect.