A method for auxiliary identification of WZSP inbred line and its special primers are disclosed. The method may comprise: testing whether a deoxyribose nucleotide at site 1273 from 5′ end of genomic DNA comprising SEQ ID NO: 1 in a test pig is A or G, measuring whether the test pig genotype is GG, GA or AA wherein the test pig with GG genotype is a candidate for the WZSP inbred line and the test pigs with GA genotype and AA genotype are non-WZSP inbred line. The method can be applied to breed WZSP inbred line, which can be used to preliminarily screen all the pigs in test pig group, eliminate non-WZSP inbred line, find out a candidate WZSP inbred line and make a further confirmation in combination with other methods. The method and primers can also be used to judge whether a WZSP on market is counterfeiting or not.