Water jet cleaner's high-pressure hose is made of multi-layer steel wire braid and synthetic rubber, and has the characteristics of high-pressure resistance, heat resistance, cold resistance, and permanent deformation resistance. When cleaning the pipe, the radius of bend of hose should be greater than 8 times the outer diameter of hose, and software must not be twisted or deformed. When used at low temperature, water in the pipe will freeze or freeze after shutdown, which may damage the hose. Therefore, water in the pipe must be drained after shutdown.