The invention discloses a bistatic SAR anti-jamming performance assessment method for an immune ground jammer region. Through the method, anti- jamming performance assessment on a bistatic SAR systemconfiguration is realized. The method comprises the implementation steps that a jammer possible distribution region matrix is constructed; general influence factors influencing jamming-to-signal ratios in a bistatic SAR receiver are obtained through decomposition; the general influence factors with maximum jamming energy under the maximum detectable jamming-to-signal ratio are calculated; a jammerantenna gain influence factor matrix, a bistatic SAR receiver antenna gain influence factor matrix and a jammer and bistatic SAR receiver distance influence factor matrix are generated respectively;a general influence factor matrix is generated; the immune ground jammer region is calculated; and anti-jamming performance assessment is completed. According to the method, the immune ground jammer region is creatively proposed, and the larger the immune ground jammer region, the better the anti-jamming performance; only a small amount of bistatic SAR configuration basic information is needed foranti-jamming performance assessment, an imaging algorithm is not needed, and therefore time cost is saved; and the method is used for assessing the anti-jamming performance of the bistatic SAR systemconfiguration.