The invention discloses a well repairing work one key well control blowout preventing technology. The technology includes the steps that when the well blowout omen happens, a driller puts an oil pipeto a well opening, and a hydraulic slip is closed; a controller well control blowout preventing button in a driller room is pressed, a hydraulic blowout preventing device below a well control platformis closed, and a plug valve perpendicular position adjusting mechanism ascends to the work position; a plug valve horizontal position adjusting mechanism drives a rotating shell outer arm to move toa work position above the well opening; the plug valve perpendicular position adjusting mechanism descends to the initial position, and a plug valve rotating power mechanism rotates to drive the plugvalve to begin to be buckled till the plug valve is tightly screwed with a well opening oil pipe coupling; a plug valve rotating power mechanism rotates continuously, a shear pin is twisted off, and afirst hydraulic motor is separated from the plug valve; the plug valve perpendicular position adjusting mechanism ascends to the work position, a pressure gauge installed on a plug is exposed, and pressure in the well is displayed; a rotating oil cylinder of a hydraulic well control blowout preventing plug device acts, and a rotating arm is driven to return to the initial position; and a liftingoil cylinder of the hydraulic well control blowout preventing plug device descends to the initial position.