The invention relates to a reconnaissance receiving processor for a synthetic aperture radar signal and belongs to the field of radar signal reconnaissance. The reconnaissance receiving processor comprises a display control module, a clock source module, a search-tracking module, a data acquisition module, a signal processing module, a data storage module and a data dump module, wherein the display control module is mutually connected with the clock source module, the data acquisition module, the signal processing module, the data storage module and the data dump module; the clock source module and the data acquisition module are mutually connected; the clock source module and the search-tracking module are mutually connected; the data acquisition module and the search-tracking module aremutually connected; the data acquisition module and the signal processing module are mutually connected; the search-tracking module and the signal processing module are mutually connected; the signalprocessing module and the data storage module are mutually connected; and the data storage module and the data dump module are mutually connected. The reconnaissance receiving processor combines narrow-band searching with broad-band parameter measurement and widens the working dynamic range of the whole system. The signal searching supports various work modes, and the interference resistance is realized by comparing the searched signal parameters with interested signal parameters.