In view of the facts that fuse target near-field scattering characteristics is affected by series of factors such as antenna pattern, target's partly illuminated and missile and target encounter state, and calculating process is complex, in this paper, a real-time simulation method of target near-field scattering characteristic is presented based on FEKO. Then, a model of missile and target encounter is established in view of the characteristic of fuse operation phase, fuse target near-field dynamic scattering characteristic is calculated real-timely. The result shows that the near-field scattering intensity has something to do with the target's illuminating parts and the missile miss distance. The smaller, the missile miss distance, the stronger, the scattering intensity, and the scattering intensity will present a big undulation cause in the different illuminating parts when a missile is very close to target.