The invention provides a processing method for metal pipe fittings, which relates to the technical field of mechanical manufacturing and processing. During operation, metal pipe fittings need to be cut, pipe notched, positioned and clamped, welded, welded seam processed, sealed and put into storage, etc. steps of processing. The invention can solve the problems existing in the angle butt welding process of the existing metal pipe fittings. When the existing pipe fittings are connected by welding, it is necessary to manually control the angle adjustment of the pipe fittings according to the angle of the welded pipe fittings. During the operation, it is necessary to manually control the clamps to fix the pipe fittings. The accuracy of manual adjustment of the welding angle of pipe fittings is poor, which affects the precision of the connection angle of pipe fittings. Manual adjustment of pipe fitting angle welding operations requires manual adjustments for pipe fittings with different welding angles. The accuracy of angle adjustment is low, which affects work efficiency and pipe fitting welding the quality of.