The invention relates to the production field of mechanical parts with a cold extrusion forming technology, in particular to a cold extrusion processing method for a coupling fork. The processing method comprises the following steps of shaping, shaping, squaring and centering, necking and extruding of a square hole, extruding of a threaded hole, trimming and perforation; an original cutting technology or casting technology is replaced, and the production technology has the advantages of high utilization rate of raw materials, energy saving and environmental protection, and the energy consumption is reduced by 80% or above than the energy consumption of the original technology; and the coupling fork prepared with the production technology has the advantages of higher quality and density andexcellent mechanical property after the coupling fork is subjected to extrusion treatment.