According to the characteristic of general expanding target, linked with the fact of some especial rapid expanding target (such as these targets that re-entry atmosphere rapidly or super rapidly), these targets’ disaggregation and characteristics were analyzed in the process of its violent changes, and it is pointed out that general image tracking algorithms based on contrast-based tracking algorithm were difficult to be applied in this case. Based on comprehensive features of these algorithms,an weighted-edge tracking algorithm is given. Combined with FDEKF filter, it realized stably and automaticly tracking the disaggregation of these targets which re-entry atmosphere rapidly or super rapidly. Through simulation testing with a sequence of images of these targets back into atmosphere, and compared with other contrast-based tracking algorithm, the results show that the algorithm has better stability and higher precision in tracking such targets with rapid running movements and radical changes, and it is easy to be implemented.