Special device for surface milling and drilling of automobile connecting fork and using method of special device

The invention provides a special device for surface milling and drilling of an automobile connecting fork and a using method of the special device. The special device comprises a lathe bed, a base, a power supply and a clamp base, and further comprises a chuck sliding base, a hydraulic chuck, a sliding rail, an electric sliding rod and a driving motor I, drilling spindle heads are arranged on the two sides of the bottom of the clamp base, each drilling spindle head comprises a servo supply motor I, a drill bit and a long rod I, a section spindle head is installed above each drilling spindle head in parallel, each drilling spindle head comprises a saw blade milling head provided with milling cutter discs, the milling cutter discs are vertically and movably installed in parallel, and positioning pins I are arranged on the milling cutter discs. A connecting fork storage clamp, a driving motor II and a manipulator are arranged close to one end of the lathe bed; a telescopic pipe is arranged between the connecting