The winch is used to extract water on offshore platform, use the winch to pay out the submersible pump under water, from submersible pump to hose, transport seawater to the platform. When working, the pump can be adjusted at any time according to the needs of the winch without stopping. The electric lifting winch is responsible for the pulling in and paying out of the submersible pump group and hose, when the lifting winch is pulling in submersible pump and hose, the storage drum is rolling up and storing the hose, when the lifting winch is paying out submersible pump and hose, the storage drum is releasing hose at the same time.