Chorthippus changbaishanensis longipennis ssp. nov., a new subspecies of Chorthippus Fieber collected from Jilin Province, China, is described. It differs from the nominal subspecies, Chorthippus changbaishanensis Liu, in the following characters: 1) both tegmina and hind wings of male and female are developed, their length approximately equal, surpassing the apex of hind femur; 2) longitudinal diameter of female compound eyes is 1.4 times longer than horizontal diameter, and 1.12 times length of subocular furrow; 3) foveolae of female is shorter, the length is about 2.5 times the width.