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In order to solve the problem that the accuracy of passive target positioning and tracking of reconnaissance satellite is not up to standard, an application algorithm of target positioning of reconnaissance satellite based on distributed SAR system is proposed. With the help of the reconnaissance adjustment module, the actual disposal authority of the satellite target phase accumulator is estimated, the positioning application relationship between the SAR storage module and D/A distribution module is scheduled, and the satellite positioning execution structure based on the distributed SAR system is built. On this basis, the ideal type of positioning sensor is selected, and the communication and transmission protocol required for positioning is connected through the transformation of positioning coordinates to realize the target self-positioning processing of the reconnaissance satellite. Based on the principle of joint distributed positioning, while measuring the reconnaissance Angle of the satellite target, the target positioning information is received and transferred, and the application of the target positioning algorithm of the reconnaissance satellite is realized. The experimental results show that compared with the behavior of DDS algorithm, the LCT index and LOC index value both exceed 60% after the application of the new positioning technology, which can inhibit the occurrence of the passive target loss precise positioning and tracking behavior of reconnaissance satellites.