Based on the study of the secondary forests in Lianyuan Longshan Forest Park of Hunan, the theory of forest spatial structure and near the natural forest management objectives, the paper selects major factors of forest management decision as conditions attributes, with the main management measures-selective cutting as a decision-making properties, applis rough set theory attribute reduction, accesses to the decision-making factors and indicators of priority weight, simplifies and improves the forest management decision-making system of indicato...