To reduce the quantity of inferior ring members processed with a cylindrical raw material cutting apparatus by providing a method for controlling the cylindrical raw material cutting apparatus that appropriately adjusts the amount of half-cutting and the amount of flat-pressing according to a processing state.

When abnormality of a tool load is detected with a load sensor 8e/8e during the last half-cutting, a controller 1 changes a target value of the amount of half-cutting with a tool unit A/B for half-cutting during the next half-cutting. When abnormality of a tool load is detected with a load sensor 8e/8e during the last flat-pressing, the controller 1 changes a target value of the amount of half-cutting with the tool unit A/B for half-cutting during the next half-cutting or a target value of the amount of flat-pressing with a tool unit A/C for flat-pressing during the next flat-pressing.