The airborne passive location has the characteristics of good mobility and scope range is wide. The location accuracy of traditional angle-measure only passive location is low and the location time is long. Passive location that use phase change rate as observation information can overcome these shortcomings noticed above. Research the process of filtering principle of MVEKF algorithm and its application in airborne single passive location. Come up with the principle of phase change rate location method, and from simulation results, using MVEKF algorithm in airborne single passive location can reach the result that positioning precisely and convergence rapidly.