The invention discloses an efficient magnolia grandiflora culture method. According to the method, the close planting enhancement is carried out during the seedling culture, when seedlings grow to a state that the trunk diameter is greater than 5cm, the local seedlings are subjected to additional fertilization, short cutting measures are taken for seedlings which are not subjected to additional fertilization, after the trunk diameter of the seedlings subjected to the additional fertilization reaches 10 to 12cm, the seedlings subjected to the additional fertilization are transplanted and are supplied to the market, and the rest seedlings are subjected to additional fertilization. The efficient magnolia grandiflora culture method provided by the invention solves the problems of slow benefit obtaining and low integral benefits in the traditional magnolia grandiflora culture technology. The cultured seedlings are sturdy, the crown shape and the trunk shape are very good, the pest and disease damage is little, the seedling root system is well developed, the seedling yield is high, the transplanting survival rate of greening seedlings is high, and the adaptability is high. The magnolia grandiflora culture mode has the advantages that on the basis of sufficiently utilizing the photosynthesis theoretical knowledge of trees and the forest ecological structure theory, the seedlings are creatively configured, various culture measures are flexibly utilized, the operation is simple, convenient and feasible, in addition, the cost is low, and the popularization and the application are easy.