Avian and mammalian biodiversity was monitored by camera traps in Heilongjiang Liangshui Reserve from December 2013 to May 2015 and at Fenglin Reserve from April 2014 to May 2015. In Liangshui Reserve, we collected 10,736 capture dates and 14726 effective photographs, including 514 independent mammal photos and 107 independent avian photos. The mammalian fauna identified belonged to four orders, seven families and 11 species, and the avian fauna belonged to four orders, eight families, and 11 species. In Fenglin Reserve, we collected 7460 capture dates and 13677 effective photos, including 638 independent mammal photos and 166 independent avian photos. The mammalian fauna identified belonged to three orders, six families, and nine species and the avian fauna belonged to four orders, 10 families, and 16 species. The number of avian and mammalian fauna monitored accounted for 70%-78% of the total number of species in Liangshui Reserve, whereas that in Fenglin Reserve accounted for 80%-89%. A larger number of avian and mammalian fauna were monitored in Liangshui Reserve and Fenglin Reserve, respectively. Sciurus vulgaris and Eutamias sibiricus possessed the highest Relative abundance index(RAI)among the mammals, followed by Capreolus capreolu; among the avians, Sitta europaea, and Turdus pallidus possessed the highest RAI. The biodiversity index revealed no significant difference in diversity between avian and mammalian fauna. In addition, the mammal community similarity index (Cs) was 0.621, suggesting that avian and mammalian fauna of Liangshui Reserve were largely similar to those in Fenglin Reserve. The present survey suggests that we lack data on nocturnal small rodents among mammals, and most of the avian fauna monitored mainly live ower the forest.