Based on the herbarium specimens and literature study,as well as field investigation,the Corydalis species in Qinling Mountains were investigated.The results showed that there were 28 species in this region,including 5 endemic species.Geographic distribution study showed that 8 species were widespread,7 species distributed in the western region,7 species in middle region,1 species in eastern region,3 species in middle and west region and 2 species in middle and eastern region of Qinling Mountains.A key to species is proposed.