All 90 sample trees of Liquidambar formosana were obtained in 10 diameter classes including40 stem analysis,based on the 8th Consecutive Forest Inventory data of the distribution of camphor in Guangdong Province in 2012,the growth models of different site grades of Liquidambar formosana were studied.The results showed that:(1)optimal equations to simulate the growth process of DBH,tree height and volume were of Gompertz,which were as follows:D=43.100e~((-3.277e-0.067T)),H=19.404e~((-2.336e-0.111T)),V=1.244e...