The invention discloses a full-automatic secondary foam molding machine. The machine structurally comprises a main control box, a hydraulic station, heating machine stations, cooling machine stations and a rack, wherein the hydraulic station, the heating machine stations and the cooling machine stations are erected on the rack respectively; the machine further comprises main sliding rails, an automatic mold changing device and an operation platform; the main sliding rails are arranged on one side, opposite to the heating machine stations and the cooling machine stations, of the rack; mold clamping devices are clamped on the main sliding rails; and the operation platform is fixedly connected on the rack and is located on the same side as the heating machine stations and the cooling machine stations and at one end close to the hydraulic station. With the adoption of the technical scheme, the machine is configured with the mold clamping devices driven by hydraulic cylinders, so that automatic mold sending and taking functions are realized, the labor intensity is reduced, and the working efficiency is improved; the machine is configured with the automatic mold changing device, molds after a hot-pressing completion procedure are automatically sent into the cooling machine stations, after setting, the molds are taken by the automatic mold changing device and moved to be sent to charging and product taking workbenches, manual mold pushing and pulling are replaced, and the labor intensity is greatly reduced.