Curved surface milling cutter and use method thereof

The invention provides a curved surface milling cutter and a using method thereof.The curved surface milling cutter comprises a cutter handle and a cutter bit, the cutter bit is arranged on the cutter handle, the top of the cutter bit is provided with a top cutting plane, the outer side of the top cutting plane is of an inwards-concave structure in the circumferential direction to form an annular inwards-concave surface, and at least three chip containing grooves are evenly formed in the annular inwards-concave surface in the circumferential direction; the chip flute comprises an assembling groove chamber and a chip discharging groove chamber, the assembling groove chamber comprises a first plane, a second plane and a third plane, the first plane and the second plane are used for positioning the blade, the third plane is used for fixing the blade, the chip discharging groove chamber is provided with a first through hole, and the axis of the first through hole intersects with the blade. The second through hole