Sensor field of view occlusion analysis is an important part of the spacecraft layout design. Considering the large workload, high error rate and the inability to quantify the occlusion rate in the large-scale orbiting spacecraft sensor field of view analysis, a fast analysis method of field of view occlusion based on the first angle of view is proposed. By setting the first view image mask and image mapping, simulating the field of view of various sensors, such as pyramids, cones, spheres and so on, the field-of-view blocking rate and occlusion orientation are calculated by pixel-by-pixel comparison. The results show that the new method can significantly improve the efficiency and accuracy of the field of view occlusion analysis, and provide an effective tool for the analysis of the sensor field occlusion of the mechanism component movement.