The invention provides a hot plate welding die which comprises an upper die and a lower die. The upper die is provided with buckling structures used for buckling upper die products. The lower die is provided with a pressing plate structure used for preventing a lower die product from being lifted up. The upper die is further provided with adsorption structures used for adsorbing the upper die products. The hot plate welding die has the advantages that the semi-automatic product assembly and disassembly are realized, the working intensity of an operator is reduced, the production efficiency of the die is improved, and the mass production of the die is realized.