A hull auxiliary mechanism for reducing a draft of a hull, comprising: a guide baffle on each side of the hull, two ends of the guide baffle extend out of a front end and a rear end of the hull, a lower end of the guide baffle extends out of a bottom of the hull, the front end of the hull is a first flat inclined plate, and the rear end of the hull is a second flat inclined plate, the bottom of the hull is a flat plate; characterized by a water resistance mechanism, the water resistance mechanism comprises a first diversion pressure plate, a second diversion pressure plate and a third diversion pressure plate; a lower end of the first diversion pressure plate is hinged on the first flat inclined plate at the front end of the hull, a first hydraulic cylinder is arranged in the hull, a rod body of the first hydraulic cylinder passes through the first flat inclined plate at the front end of the hull and the rod body of the first hydraulic cylinder is hinged to an upper end of the first diversion pressure plate; the second diversion pressure plate is arranged parallel to the flat plate at the bottom of the hull, and a first side of the second diversion pressure plate close to the front end of the hull is hinged with the flat plate at the bottom of the hull, the hull is provided with a second hydraulic cylinder, and a rod body of the second hydraulic cylinder is hinged with a second side of the second diversion pressure plate through the flat plate at the bottom of the hull; a lower end of the third diversion pressure plate is hinged on the second flat inclined plate at the rear end of the hull, a third hydraulic cylinder is arranged in the hull, a rod body of the third hydraulic cylinder passes through the second flat inclined plate at the rear end of the hull and the rod body of the third hydraulic cylinder is hinged with an upper end of the third diversion pressure plate. a guide baffle on each side of the hull, two ends of the guide baffle extend out of a front end and a rear end of the hull, a lower end of the guide baffle extends out of a bottom of the hull, the front end of the hull is a first flat inclined plate, and the rear end of the hull is a second flat inclined plate, the bottom of the hull is a flat plate; characterized by a water resistance mechanism, the water resistance mechanism comprises a first diversion pressure plate, a second diversion pressure plate and a third diversion pressure plate; a lower end of the first diversion pressure plate is hinged on the first flat inclined plate at the front end of the hull, a first hydraulic cylinder is arranged in the hull, a rod body of the first hydraulic cylinder passes through the first flat inclined plate at the front end of the hull and the rod body of the first hydraulic cylinder is hinged to an upper end of the first diversion pressure plate; the second diversion pressure plate is arranged parallel to the flat plate at the bottom of the hull, and a first side of the second diversion pressure plate close to the front end of the hull is hinged with the flat plate at the bottom of the hull, the hull is provided with a second hydraulic cylinder, and a rod body of the second hydraulic cylinder is hinged with a second side of the second diversion pressure plate through the flat plate at the bottom of the hull; a lower end of the third diversion pressure plate is hinged on the second flat inclined plate at the rear end of the hull, a third hydraulic cylinder is arranged in the hull, a rod body of the third hydraulic cylinder passes through the second flat inclined plate at the rear end of the hull and the rod body of the third hydraulic cylinder is hinged with an upper end of the third diversion pressure plate.