Abstract: In order to meet the need of the watershed forest management practice in Liupan Mountains,supported by sample-plot survey method and system-analysis method,based on the field investigation data of sample plots,the structure characteristics and the relationship between the structure and functions of main types of the watershed forests in this area are analyzed in this paper.Objective structure patterns of watershed forest stands are put forward,such as the present natural broad-leaved mixed forests,and the coniferous and broad-leaved mixed forests,of which the natural coniferous and broad-leaved mixed forest of Pinus armandi is an optimal objective structure pattern.And considering their various characteristics,the stand types in this area are regulated and optimized,and some feasible management measures and countermeasures are put forward in the study.

Key words: watershed forest stand, structure, function, objective structure pattern, optimized structure regulation, Liupan Mountains