Using similarity recurrence method, the measuring phase difference result based on short baseline can be widened to multi-stations passive location system with long baseline. Because the phase difference ranging of two stations is based on the three stations location technology and its measurement accuracy is not associated with velocity of light whose magnitude is enormous, the higher positioning accuracy can be realized as compared with the DF of two stations and the time difference of three stations in existence. But, the path difference obtained by recurred must be corrected in order to realize veracious location. On the basis of existing analysis, this paper presents a correct method which is more applicable for engineering design by making use of the cut Angle between two stations.