The invention relates to a cold extruding processing method of a spline housing and the spline housing produced by the same. The cold extruding processing method of the spline housing comprises the following steps: blanking of a tubular blank, annealing of the blank, performing turning on an inner bore, saponification of phosphorus, hole shrinkage and extrusion, cold extrusion of the spline and turning and shaping. The wall thicknesses of the larger end, transmission section, and smaller end of the spline manufactured by the method are equal, wherein yield torsion of the spline housing is more than 30,000Nm. The invention has the beneficial effects: firstly, the application of two cold extruding molding processes ensures that the strengthen of the material are improved after the cold-workhardening, the whole part is designed in an equicohesive manner, and greatly improves the material utilization and reduces the process cost; secondly, the processing procedures are reduced, the processing cycle of the part is shorten, and the production efficiency is improved while the cost is lowered; and thirdly, the hot processing procedures such as forging and tempering with high-energy consumption and pollution are cancelled, thus achieving obvious effects of energy saving and emission reduction.