The passive infrared mono-station location algorithm for mobile targets is investigated.The passive location physical model and the related algorithm for mobile target are established.The algorithm in this paper can be effectively applied to the location for both uniformly accelerated mobile targets and those with varying acceleration.Numerical simulations verify the correctness and the feasibility of the algorithm and indicate that the relative ranging error is less than 5% of the slope distance from target to platform,which satisfies the specification requirement of mono-station infrared passive location.