Abstract: To screen suitable garden tree species for Xichong County and cities with similar ecological environment, 52 tree species were evaluated on the basis of survival rate, growth status and cold resistance in Xichong nursery of Nanchong City Garden Management Office.The results showed that the tree species could be broadly divided into four categories:very suitable, suitable, basically suitable and unsuitable. 32 species were very suitable, 10 species were suitable, 7 species were basically suitable, and 3 species were not suitable. It was of important significance for enriching and supplementing the selection of suitable garden tree species in Nanchong City, and promoting the sustainable development of the greening business in other cities with similar ecological environment.