Tool for milling plane of steering knuckle arm

The invention discloses a tool for milling the plane of a steering knuckle arm. The jig comprises a bottom plate, and a location assembly mounted on the bottom plate, wherein the location assembly includes a transverse location plate, a vertical location plate, a cushion block, a pressing plate and a stud bolt, wherein the transverse location plate and the vertical location plate are arranged on the left side of the upper end face of the bottom plate; the cushion block is placed on the right side of the upper end face of the bottom plate; the pressing plate is arranged at the middle part of the upper end face of the bottom plate; and the stud bolt acts on the pressing plate; and one end of the stud bolt is fixed on the bottom plate, and the other end of the stud bolt penetrates through the pressing plate to tightly press the pressing plate through a nut. Through the new design, the tool for milling the plane of a steering knuckle arm can effectively limit the degree of freedom in the X, Y and Z directions of a workpiece through the transverse location plate, the vertical location plate, the pressing plate and the like additionally arranged on the bottom plate of the tool. The tool is in accurate in location and simple in operation, and is convenient in clamping and is easy in adjusting the workpiece. In addition, the milling machine has high processing efficiency, can effectively obviate the production of rejects, and can be widely used in the milling processing of various kinds of steering knuckle arms.