The cross flow heat exchanger is composed of thin metal plates which are parallel to each other. The surface of the metal plate is a corrugated surface. The flow path has self-flowing cold and hot fluid bodies, and the metal plate is replaced by a heat exchange surface. The main structure of the plate heat exchanger is a metal plate, and there are also auxiliary members such as a pressing device and a sealing gasket. The sealing gasket functions to prevent internal leakage between fluids, and it is subjected to temperature and pressure during operation. It is often eroded by the working fluid. Therefore, the performance of the gasket directly determines the temperature bearing capacity and service life of the plate heat exchanger. The metal corrugated sheet is the main heat exchange component of the plate heat exchanger. According to the surface corrugation shape, it can be divided into metal plate with herringbone corrugation, horizontal corrugation and oblique corrugation. The most widely used metal plate is the herringbone corrugated plate.Heat transfer efficiency, pressure bearing capacity and fluid resistance are the main reference indicators for measuring the performance of corrugated sheets. The reason why herringbone corrugated sheets are widely used is because of their high heat transfer efficiency and high pressure bearing capacity. The cross-section structure of the flow channel between the plates is related. In a word, the herringbone corrugated plate is the best performance in the current plate.