Typhoons are an extreme weather disaster that strikes coastal cities in south-eastern China every year. This study was based on a tree management project counter measuring to typhoon disasters in a park in Guangzhou, China. Based on the tree risk assessment methods, the research group tempted to explore a much more precise management basing on the wind field characters of the park. Thus, this study conducted some explorations on computational fluid dynamic (CFD) methods on extreme strong wind simulations in the urban environment to find out the field character and support the tree management works in future. Main results were found out in this research: (1) The CFD simulation revealed that the main risk area of the Central Park lied at the southern area, west-northern area, and both paths on the eastern and western sides; (2) The peak wind speed at the height of 5 m and 10 m could reached the wind scale of level 9 to level 11 when the boundary wind speed was set at 24 m/s; (3) With the overlapping of tree locations and wind risk areas, this study could support the tree management in a much more precise way in future. Thus, this study provided a CFD method on urban extreme wind assessment for tree management, which would be valuable for other similar problems in urban environments.