Abstract: With the rapid development of science and technology, the infrared reconnaissance equipment is widely used in airborne platforms. There is an obvious mismatch in operating distance of infrared sensor and laser sensor in typical airborne infrared equipment, which can't accurately locate the ultra-long distance targets. In order to realize the high precision location of long distance or ultra-long distance targets under the conditions of distance deletion, the method of passive location based on multi-platform collaborative detection was proposed. The simulation results show that the passive location algorithm based on multi-platform collaborative detection can effectively realize the high precision targets location, and the location precision is about 7%R, which is superior to that of traditional TDOA and DOA methods.