The application discloses a prevent that shield from constructing pressurize pump unit that screw machine gushed includes: a pedestal. An electric control system. A hydraulic system. A dregs conveying system for carrying the dregs, for dregs conveying system with hydraulic system provides the driving system of power, electric control system with driving system, hydraulic system, dregs conveying system are connected, control each system, dregs conveying system comprises master cylinder, water tank, dregs transport jar and hopper, be equipped with the dregs piston in the dregs transport jar, be equipped with the rabbling mechanism in the hopper, the hopper below is equipped with the slide valve, dregs conveying system is connected with the dregs conveyer pipe through Y word pipe. The utility model adopts the above structure prevent that shield from constructing pressurize pump unit that screw machine gushed, in earth pressure balance shield machine work progress, the pressure of muddy water in the time of can the operation of effective control screw machine, the condition of avoiding gushing takes place, guarantees tunnelling speed and construction safety.