Aimed at the existing problems in the traditional track initiation algorithm applied in the near space hypersonic target track initiation, a feasible multi-rules fast track initiation method is proposed. On the basis of analyzing the motion characteristic of near space hypersonic target, first the noise interference is reduced by the height constraint and speed constraint and the possible track is set up. Then, by using the velocity constraints and acceleration constraints the candidate track is established, and finally through the angle constraint V track is eliminated and the true path is determined. The Monte Carlo simulation results show that the use of the method can initiate near space hypersonic target tracks in the clutter environment, and has a high correct track initiation probability, low false track initiation probability and short average track initiation time. The method has a good prospect in engineering application.