Abstract:Four methods for comparative analysis Including (A)clear-cutting, (B) volume (VOB) conversion, (C) regression model and (D) mean sample tree, have been used to measure or estimate the biomass of the tropical mountain rain forest in Hainan island,and the biomass measured by method(A) was used as a common standard for comparasion to those estimated by the other methods. Based on these methods,following results have been achieved:Method (B) is not suitable for estimating biomass of tropical mountain rain fores...