In order to solve the problems of uncertain quantity of supply and demand, scattered supply points, many demand points and constrained allocation time in the period of land material scheduling of large section of expressway project, this paper realizes the high efficiency allocation under the three-level network structure. A nonlinear programming model with the premise of demand satisfaction rate and total transportation time and total cost is established. The weight and confidence level of fuzzy numbers are determined by the method of the most probable value, and the triangular fuzzy numbers are treated by the average weight method. Dynamic weight of transportation time and cost to improve the scientific nature of decision-making. Finally, taking Qianjiang to Shishou Expressway Project as the background, a simulation example is designed, and LINGO software is used. The model is solved. The results show that the model can fully consider the two relationships between supply and demand imbalance of ground timber, and provide scientific basis for scheduling decision.