Abstract: 120 Inner Mongolia cashmere goats were selected in this study. Parts of the sequences of KAP1.3 and KAP6.1 genes from cashmere fiber protein were selected as the candidate genes by PCR-SSCP techniques. The selection of the economic traits of the candidate genes were evaluated through studying on its Polymorphism. The results showed that there was significant correlation between the site S2 and the cashmere yield trait（P〈0.05） in KAP6.1 in the muhi-gene family of the keratin accessory protein by oneway Anova of the analysis software. The AA and BB genotypes were also significant correlated with cashmere yield trait by multiple comparison （P〈0.05）. The AB and BB genotypes had signifieant effects on fine wool quality （P〈0.05）.