The invention relates to an assembly line manufacturing method for a reservoir area model, and belongs to the technical field of reservoir area model manufacturing. The assembly line manufacturing method includes the steps that (1) model sand is loaded onto a transfer trolley through a conveyor; (2) the transfer trolley operates to the position of an elevator from the position of the conveyor and then the transfer trolley is conveyed to a reservoir entity model through the elevator; (3) the loaded model sand is unloaded to a reservoir area of the reservoir entity model through the transfer trolley; (4) the model sand at the reservoir area is compacted through an electric tamping machine; and (5) technicians and workers cooperate to cut the compacted model sand, and a terrain model is manufactured through a reverse method terrain manufacturing instrument so that the reservoir area model can be obtained. According to the assembly line manufacturing method, through small-sized mechanical equipment like the automatic conveyor, the elevator, the transfer trolley, the electric tamping machine and the reverse method terrain manufacturing instrument which are managed through an assembly line method, the reservoir area model at the reservoir entity model position can be manufactured, and therefore working procedures are optimized, labor cost is reduced, and the manufacturing efficiency of the reservoir area model is greatly improved.