The invention discloses a knuckle drilling die. The knuckle drilling die comprises a base and is characterized in that a supporting plate is fixedly mounted on the base; the supporting plate is divided into an upper section and a lower section; the middle of the upper section and the middle of the lower section of the supporting plate are connected through a bolt column; a supporting table is arranged on one side of the supporting plate. A positioning clamping block is arranged on the left side of the upper end of the supporting plate. The knuckle drilling die is ingenious in structure, and the tilt angle of the die can be adjusted to offset the tilt angle of a steering axle.