The invention discloses a pipe orifice welding and positioning tool for golf club heads. The tool comprises a horizontal substrate, and a pipe orifice positioning and fixing mechanism and a head positioning and fixing mechanism oppositely arranged on the horizontal substrate; the pipe orifice positioning and fixing mechanism comprises a transverse operating substrate arranged on the surface of thehorizontal substrate; one transverse side edge of the transverse operating substrate is connected with a transverse vertical plate, fixed on the side surface of the horizontal substrate, through a transverse adjusting button; one longitudinal side edge of the transverse operating substrate is fixedly connected with a longitudinal vertical plate; a vertical stand plate is arranged on the surface of the transverse operating substrate; the bottom side edge of the vertical stand plate is connected with the longitudinal vertical plate through a longitudinal adjusting button; the side surface of the vertical stand plate is connected with an angle indexing plate through an angle rotating base shaft; the side edge of the angle indexing plate is fixedly connected with a height adjusting rod; the head positioning and fixing mechanism comprises a positioning baffle plate and an expansion baffle plate arranged by a right angle; and a transverse positioning and adjusting bolt is arranged on the positioning baffle plate.