The plate heat exchanger is composed of a set of corrugated metal plates with holes for two types of heat transfer liquids to pass through. The metal plates are installed in a frame with fixed plates and movable clamping plates on one side, and are clamped with clamping bolts. The flow rate, physical properties, pressure drop, and temperature difference of the medium determine the number and size of the plates. The corrugated plates not only improve the degree of turbulence, but also form many support points that are sufficient to withstand the pressure difference between the media. The metal plates and the movable clamping plates are suspended on the upper guide rod and positioned by the lower guide rod, while the rod ends are fixed on the support column.