Kangjinghui plate heat exchanger consists of a group of corrugated metal plates with holes on the plate, through which two kinds of liquid for heat transfer pass. The sheet metal is installed in a frame with a fixed plate and a movable pressing plate on the side, and is clamped with a clamping bolt. Sealing gaskets are mounted on the plates to seal the liquid passages and guide the fluids to flow alternately into their respective passages. The metal plate and the movable compaction plate are installed on the suspension beam and positioned by the lower guide rod, while the end of the rod is fixed on the support column. However, if one or two liquids pass through the heat exchanger more than once, the interface should be opened on the fixed plate and the movable compaction plate.