Negative pressure regulation control system for sealed cabin and isolation door cover body

According to the sealed cabin and isolation door cover body negative pressure adjusting control system, a controller controls a draught fan to rotate, air in a cabin is extracted through a cabin air pipe connector, and air in an isolation door cover body is extracted through an isolation door air pipe connector; the negative pressure value in the cabin is preferentially compared with the set negative pressure value of the cabin, the rotating speed of the fan and the angle of the cabin air inlet adjusting module are continuously adjusted, the rotating speed is adjusted to change the air inlet amount of the cabin air pipe, and the angle is adjusted to form the dislocation relation between the cabin air inlet adjusting module and the cabin air inlet air quantity control hole so as to change the air inlet amount of the cabin air pipe. The negative pressure value in the sealed cabin reaches a cabin set negative pressure value; under the conditions that a cabin runs stably and the rotating speed of a fan is fixed,