Projection registration technique can extract the rotation center point of the target from projection echo, Obtaining rotation center point will directly determines whether exacting reconstruct of target. Therefore the projection registration technique is one of the most important problems in studying laser reflection tomography. At present, Projection registration is only used to tracking and extracting feature point from cooperative target, which will greatly limits the application field of reflective tomography technology. This paper presented an improved feature point tracking algorithm, by tracking changes of the projection echo peak. In order to obtain accurate information of feature point position, weighting average all of the calculated rotation center position to eliminate the estimation error. Experimental results show that the algorithm can be directly used to non-cooperative target, which expands the application field of the laser reflection tomography technology.