Compound tool

The utility model discloses a compound tool, which is used for an occasion that orifice chamfering and oil seal seam allowance boring are carried out after the main pin hole of a steering knuckle is subjected to boring processing. The main body of the compound tool is connected with a tool holder via a bolt; the tool holder is connected with a machine tool spindle via the tail cone of the tool holder; the bottom of the main body of the compound tool is provided with two symmetrical main pin hole boring blades; one side of the shoulder part of the main body of the compound tool is provided with a main pin hole chamfering blade; the other side of the shoulder part of the main body of the compound tool is provided with an oil seal hole boring blade; the upper end of the shoulder part of the main body of the compound tool is provided with a trough reaming blade; the positions, which are used for installing the main pin hole boring blades, the main pin hole chamfering blade, the oil seal hole boring blade and the