The present invention provides a wavelength division system cutover conflict determining method and apparatus. The method includes the steps of analyzing cutover orders of a wavelength division system in a cutover time period, so as to acquire cutover information; and determining a cutover conflict determining result according to the cutover information, wherein the cutover conflict determining result incudes a first cutover conflict determining result and a second cutover conflict determining result. In the wavelength division system cutover conflict determining method, all cutover orders of the wavelength division system in the cutover time period are analyzed, so as to acquire the cutover information. Further, the cutover conflict determining result is determined according to the cutover information, and the cutover conflict determining result includes the first cutover conflict determining result representing whether a conflict is caused on a preset layer and a second cutover conflict determining result representing whether a conflict with a current fault is caused. Through adoption of the method, a determining process of the cutover conflict determining result is simplified, and the method refers to more levels, thereby helping make following cutover plans rapidly.