The suction port, discharge port and nozzle of the jet pump are on the same axis, with high efficiency. The working water pipe is bent into a J shape, and its flange is perpendicular to the flanges of the suction port and discharge port, which is convenient for installation. There are no moving parts and long service life. It has self-priming function and can work continuously and stably. It is mainly used for ship drainage and hydrophobic systems, and can also be used in environmental protection, chemical, water conservancy, building materials and other industries for pumping sea and fresh water, mixing liquids, river dredging, conveying powder and so on.