The invention discloses a pipe type part lathe fixture. According to the technical scheme, the pipe type part lathe fixture is characterized by comprising an installing base, a clamping claw is fixedly connected to the installing base and is in the shape of an arc; an inner arc surface is arranged on one side of the clamping claw; an outer arc surface is arranged on the other side of the clamping claw; the radian of the outer arc surface is larger than that of the inner arc surface; and the purposes of firmly clamping pipe type parts and clamping two pipe type parts of different specifications are achieved.