The autonomous orbit determination of navigation constellation is one of the key techniques of the Compass Navigation Satellite System (CNSS). There, howerver， is a deficiency problem of the datum mark when only intersatelite measurements of range is used. To solve this problem, this paper presents a new method that a few ground-based radio emitters should work randomly to offer the benchmark, and the constellation satellites should estimate their position and velocity for the whole network, based on the fusion of crosslink pseudo-range measurements and ground-based measurements. It is aimed to improve the orbit determination accuracy ulteriorly. Finally, the simulation results prove the rationality and validity of this method.