This paper proposed a quick evaluation method on forest resources sustainability at forest management unit level, which including indicators, procedure and grading methodology. The evaluation framework consisted of 28 indicators which under three aspects, including forest resources quality, forest resources utilization, and forest disturbance situation. The benchmark value for each indicator was derived by referencing related technical regulations, forest management handbooks, and empirical data. The measured value of indicators were divided into three classes based on the benchmark value, which include good (scored 1.0), intermediate (scored 0.62) and poor (scored 0.38). The weight value of evaluation indicator on forest resources quality was decided by using Delphi Method or Analytic Hierarchy Process (AHP), according to the forest management objectives and forest main functions. According to the observation value, given value and weight value of each indicator, the forest resources quality index, forest resources utilization index and forest disturbance situation index were calculated; then the forest resources sustainability index was calculated by using the above calculated index. The forest resources sustainability was classified into four levels based on the index value, excellent, good, intermediate, and poor.