In order to realize passive location to an emitter by multiple moving platforms practically, a cross location with angle-only measurements by two airborne platforms based on WGS-84 coordinate system was proposed. These rotational matrix used to transform line-of-sight from each own platform's coordinate system to common WGS-84 were derived，and then angle-only cross location was achieved as the midpoint of common perpendicular line segment of two lines on different planes. At the same time, using the 1st order Taylor expansion method, the error covariances by nonlinear transform of rotation and cross location were derived which were used to filter a number of single position estimations to improve positioning accuracy. By simulation, the main factors which affected positioning accuracy were analyzed in-depthly, and the performance of single time location and by filtering were studied contrastively. The results show the latter can improve precision obviously, and indicate the validation of the algorithm. The conclusion can guide practical application.