Mechanically fixed finishing tool with adjustable inner hole

The utility model relates to a cutting tool, in particular to a mechanically fixed finishing tool with adjustable inner hole. The mechanically fixed finishing tool solves the problems of the welded cutting tool for processing workpieces with inner holes, such as low utilization rate, poor flexibility and poor practicability. The mechanically fixed finishing tool comprises a tool base, a tool holder and a sector-shaped tool bit, wherein a holder mounting via-hole is formed in the tool base along the axial direction; a holder location thread hole and a location thread pin are arranged above thetool base; the tool holder penetrates the tool base; a radial annular location slot is formed on the tool holder along the axial direction; a tool bit fixing shaft is arranged on one end of the tool holder slantwise; a clamping groove is formed on the lower end of the tool bit fixing shaft; the sector-shaped tool bit is located in the clamping groove; and a pressing screw butting against the wallof the clamping groove is