Safety and leveling device for rotary drilling

The utility model relates to a safety and leveling device for rotary drilling. The device comprises a large arm oil cylinder, a drill pipe cylinder, a leveling oil cylinder and a leveling seat, wherein the bottom end of the large arm oil cylinder is fixed on an arm seat of a rotary drilling rig, and the other end is connected with a position C of a large arm and used for raising and lowering the large arm; the bottom end of the drill pipe cylinder is fixed in a position B of the large arm of the rotary drilling rig, and the other end of the drill pipe cylinder is connected with a drill pipe of the rotary drilling rig; one end of the leveling oil cylinder is fixed in a position A of the large arm oil cylinder, and the other end moves between the leveling seat and a large arm inner sliding plate; the leveling seat is mounted and fixed at the front end of the large arm; a slide is arranged between the leveling seat and the large arm inner sliding plate. The device has the benefits as follows: the device is simple in structure and stable and reliable during working, plays a role in leveling the drill pipe, can also prevent the drill pipe cylinder from being scored, and plays a role in protecting the drill pipe cylinder.