Constant-temperature cold press

The utility model belongs to the technical field of cold presses, and particularly relates to a constant-temperature cold press which comprises a cooling box, a cooling liquid circulating pipe, a workbench, a support, a lower die and an upper die. The cooling liquid flows into the cooling liquid circulating pipe from the cooling box, flows through the cooling liquid circulating pipe and then returns to the cooling box again, heat exchange is achieved between the cooling liquid circulating pipe arranged on the outer side of the lower die and the lower die, and therefore the lower die in the machining process is cooled; the cooling liquid flows into the cooling pipeline of the upper die through the hose and returns to the cooling box again after flowing through the cooling pipeline, and cooling heat is used for reducing the temperature of the upper die in real time when passing through the cooling pipeline, so that the temperature of the upper die is kept stable, and the temperature of the upper die can be kept