The intense pulsed radiation field provides experimental environment for the study of various radiation effects, and the radiation field parameters are the important basis for the experimental study. The dose intensity distribution of intense pulsed radiation field must be provided. The analysis object is the information of intensity distribution image. The effect of reconstructing intensity distribution image is the most important means to judge whether the image information is good or bad. In the dose distribution of intense pulse gamma radiation field, the main factor of image blurring is the existence of point spread function. How to obtain the point spread function and establish the point spread degradation model are the premise of image reconstruction. In this paper, the degradation model modeling and reconstruction algorithm are used to analyze the dose distribution image of intense pulse gamma radiation field. A good degradation model can improve the image quality, and the point spread function acquisition is particularly important.