针对管道焊接弯头虾米节间的环形焊接坡口面现行定角度切割方法存在的问题，提出使弯头组装后各节间形成的环焊缝夹角相等的焊接坡口面变角度切割方法，导出了可供数控切割的数学模型，并就其经济效益进行了分析。 Aiming at the existing problems of the current angle cutting method of circular welding bevel face between pipe joints of the elbow and the section of the welded pipe, a method of changing the angle of the welding bevel face is proposed, The mathematical model for NC cutting is derived and the economic benefits are analyzed.