The invention discloses an automatic assembling and rivet pressing method for a cupboard hinge. By arranging a rotating plate part, a triangular plate installing part, a stacked piece installing part, a pull strip installing part, a long nail installing part, a hydraulic pipe installing part, a short nail installing part, a rivet pressing part and a control part and controlling the other parts to act coordinately through the control part, all parts of the hinge can be automatically assembled and pressed in a riveting manner, the production cost is saved, and quality and efficiency are improved. The invention further discloses an automatic assembling and rivet pressing device for the cupboard hinge, and the automatic assembling and rivet pressing device for the cupboard hinge implements the method. The overall structure is reasonable in design, maintenance is easy, the needed operational capacity and the ergonomics requirement are met, and work has the characteristics of being fast, stable and accurate. Defects of a traditional machining manner are compensated for, mechanical and automatic scientific and technological production is achieved for an original complicated manual operation manner, the production efficiency is substantially improved, the production cost is effectively controlled, and the product quality is powerfully guaranteed.