There are sealing gaskets in the grooves around the plates of the stainless steel plate heat exchanger. The sealing gaskets seal the fluid channels and guide the fluid to alternately flow into the respective channels to form heat exchange. The plate and the movable compression plate are suspended on the upper guide rod and positioned by the lower guide rod, and the rod end is fixed on the support column. The fixed compression plate, the movable compression plate, the guide rod, the bolt, the nut, and the front support may be collectively referred to as a frame of a plate heat exchanger.The stainless steel sheet metal of the plate heat exchanger adopts the mode of mutual inversion when inserted and assembled, which forms a mesh contact, so that the fluid in the channel becomes a mesh fluid. So that the fluid flows from one end to the other end as a unidirectional circulation circuit, or forms a diagonal flow in the opposite direction to achieve the purpose of heat transfer.The plate heat exchanger has been widely used in metallurgy, mining, petroleum, chemical industry, electric power, medicine, food, chemical fiber, papermaking, light textile, and ships. .