Focused on the problem that data association will produce false intersection in passive cross location system of multiple sensors, an improved hierarchical fast association algorithm was presented. As for the algorithm, geometrical rule between mutual position relation to sensors each other and their azimuth measures to the same target was dug out, the azimuth of the candidate associations was used to construct the statistic test and eliminate some false intersection points. Then hierarchical combination was conducted for the remaining candidate associations to pick up true associations. Simulation results show that the algorithm can fast and correctly eliminate false intersection points.