The invention discloses a vertical submerged centrifugal pump. A motor is fixed to a motor bracket through screws. An output shaft of the motor is fixedly connected with an upper pump shaft through a first coupler. The upper pump shaft is sequentially provided with a bearing, a mechanical seal, a second coupler, a packing seal, a second packing seal and an impeller. The lower end of the impeller is provided with a suction section, and the right end of the impeller is provided with a discharge section. A washing pipeline is connected with the packing seal, the second packing seal and a discharge pipeline which is connected with the discharge section. According to the vertical submerged centrifugal pump, the upper pump shaft is fixedly connected with a lower pump shaft through the second coupler, the lengths of the pump shafts are twice those of common pump shafts, and the vertical submerged centrifugal pump can be used for transporting deep liquid and is wider in application range; the washing pipeline is additionally arranged for washing the packing seal and a pump body, so that the inside of the pump body is not prone to blocking, and the reliability of the pump body is improved; and the vertical submerged centrifugal pump is usually used for petrochemical, sewage treatment, sea water desalination, electric power and steel metallurgical fields and the like.