The invention relates to a processing method of a profile. The method comprises the following steps: reading section data according to the processed profile to obtain variable section data of thickness variation of the profile; performing analysis under the current order requirement to obtain a processing area of the profile; checking whether laser cutting processing is needed in the variable cross-section area of the profile; if not, maintaining the current normal cutting processing; if yes, giving initial power and initial moving speed of laser cutting; when laser cutting light moves to thevariable cross-section area, adjusting power and moving speed of laser cutting to complete cutting processing of the profile in the variable cross-section area. According to the method, various typesof profiles can be effectively cut, laser cutting power and moving speed are flexibly and automatically adjusted, and cutting effect is ensured.