Hole forming device for gypsum board

The utility model discloses a hole forming device for a gypsum board. The hole forming device comprises a drill bit, movable knife heads, nuts, a movable panel and a knife head regulating groove, and is characterized in that the knife head regulating groove is formed in the middle part of the movable panel, the drill bit is arranged at the center of the knife head regulating groove, the two movable knife heads are respectively arranged in the knife head regulating groove on the two sides of the drill bit, and the movable knife heads are fastened with the movable panel by relying on the nuts. When the hole forming device is used, the drill bit is used for drilling into the central point of a hole-forming position, the movable knife heads are moved to the two ends of the diameter of the hole-forming position, the nuts are screwed tightly for fastening with the movable panel, the movable knife heads are adjusted to the surface of the gypsum board, and then the movable panel is slowly rotated by exerting force. T