Space optical remote sensors are developing in the direction of higher resolution and detection function density. High-resolution, light and small cameras with both visible and infrared detection functions have gradually become a research hotpot. As the main vibration source, the micro-vibration of the refrigerator is one of the key factors affecting the imaging quality of the optical remote sensor. In order to quantitatively evaluate the micro vibration characteristics of infrared refrigerator and its influence on imaging performance, and solve the disturbance of micro vibration to high-resolution imaging system, the micro vibration generation mechanism of pulse tube stirling refrigerator is analyzed, and the micro vibration performance is tested and analyzed under different power and service conditions by fixed support dynamometer. Based on the micro-vibration test of the refrigerator, the micro vibration suppression strategy of micro vibration transmission path in the application link is proposed. The finite element simulation analysis of the whole machine shows that the influence of micro vibration on the imaging system is reduced to 0.02%, which proves its effectiveness.