The invention discloses a star sensor star point image enhancement method, which is a superposition enhancement method after reconstruction of a star point image. Through motion information acquired by the star sensor and a star point extraction and recognition result of the current frame, a nonlinear model for star point motion is adopted to realize star point position prediction and tracking andrecognition in a next frame, and position prediction results of star points at different positions in an image plane are more accurate; by using the predicted star point position and the star point information in the former frame, a star point motion energy distribution model is used to generate one frame of noise-free simulated star map, the energy distribution is closer to the actual star points, no complex matching alignment process is needed, better star point superposition enhancement effects can be obtained, and the star point extraction precision is improved. The method is suitable when the star sensor is in a static condition and a dynamic condition, star point position prediction and tracking and recognition can also be realized, the star sensor processing time is further reduced, and the star sensor attitude output errors are reduced.