Abstract:Tree health in Songshan Park, Macao was evaluated in terms of tree disease, pest and liana destroy using transect sampling method, which six transects and 900 trees were investigated. The results showed that two thirds of the transects and about 18.9% trees were under unhealthy status. The 32 unhealthy species belong to 20 families, 23 genus. It indicated that the trees in this Park were in relatively lower healthy status. Some suggestions were given, including find out pathogenesis of tree pests, cut off the diffusion route; control invasive plants and native harmful plants; reconstruct landscape and restore vegetation to build the healthy community; establish the warning mechanism for long-term monitor of tree health dynamics.