Referring to national standard of GB7939-87 Rubber Hose Connector, we improved design on the basis of the product's use and character and produced types of assembly of high-pressure oil pipe and pipe connectors, which are scientific in design, advanced in technology, easy to use and able to stand wear and tear. The products serve as indispensable connecting parts for soft pipeline in hydraulic drive system and can be widely used in equipments for different purposes in mine, metallurgy, construction, petroleum, chemical textile, coal, engineering machinery, crane machinery, traffic transporting machinery, mould plastics machine, pressure machine and farm machinery.