Abstract: This paper describes a new species of the genus Fannia R.-D.From Inner Mongolia Autonomous Region,China.The type specimen is deposited in the Institute of Entomology,Shenyang Normal College. Fannia alxaensis sp.nov.(Figs.1-3) This new species is similar to Fannia pallitibia (Rondani,1866) from Europe,but differs from the latter in 2nd antennal segment yellow;prealar bristles 2;mid and hind femora orangeyellow,mid tibia with 1 small anterodorsal bristle at 1/4 of distal part,hind femur without posteroventral bristle;abdomen without median stripe,rather narrow distal part of the cerci in posterior view,surstylus wide and short. Holotype ♂,Alxa-youqi,Inner Mongolia Autonomous Region,101°40′E,39°10′N,1300 m,wilderness,21-Ⅵ-1986,collected by Tian Zhao-feng.