Polyvinyl chloride plastic reaction kettle

The utility model discloses a polyvinyl chloride plastic reaction kettle which comprises a kettle body and a cover body, the cover body is arranged at the top of the kettle body, and the cover body is connected with the kettle body through a cover opening assembly; the cover opening assembly comprises a connecting arm, a rotating arm and a driving part, the connecting arm is vertically fixed on the outer wall of the kettle body, the rotating arm is of a break-shaped structure, one end of the rotating arm is glued with the top end of the cover body, and the other end of the rotating arm is rotationally connected with the top end of the connecting arm; the driving part is connected with the rotating arm and used for driving the rotating arm to rotate. According to the utility model, the cover body can be opened by arranging the cover opening assembly without the aid of hoisting equipment such as a crown block, and when the cover body is closed on the kettle body, the cover body can be pressed on the kettle body