Abstract: From August 2019 to March 2020, 90 camera traps were installed for 210 day to investigate mammal diversity in the Pingbian county. We recorded 20 wild mammal species belonging to 11 families and 5 orders, including four protected animals of national second-level key(Macaca arctoides、Elaphodus cephalophu、Prionodon paricolor、Prionailurus bengalensis).The Relative abundance of small mammals is higher than large mammals in the Pingbian county. Many protected animals of national second-level key are distributed in the forest farms outside the nature reserve.