Cylinder hole machining method and cutter structure

The invention discloses a cylinder hole machining method and a cutter structure, specifically, a bar is provided, and the bar is provided with a prefabricated hole; rough machining is conducted, specifically, the prefabricated hole is subjected to rough boring machining till the first allowance hole diameter is achieved, and a machined bottom hole is formed; the machining bottom hole is divided into a first hole section and a second hole section in the length direction of the machining bottom hole, the first hole section and the second hole section are sequentially cut to a second allowance hole diameter through a cutter structure, and a semi-finished product cylinder hole is formed; and finish machining is conducted, specifically, the semi-finished cylinder hole is subjected to finish boring machining to a preset hole diameter, so that a finished cylinder hole is obtained, and the preset hole diameter, the second allowance hole diameter and the first allowance hole diameter are gradually reduced. And the pre