The invention discloses a method for recycling metal injection molding stainless steel waste feedstock, and relates to the field of metal powder metallurgy. According to the method, the type and the content of the loss binder component in a stainless steel waste material is determined by utilizing multiple kinds of representation and detection means, moreover, the loss amount of the correspondingcomponent is supplemented, and then the stainless steel waste feedstock subjected to recycling processing is obtained through internal mixing, extrusion and granulation; the stainless steel waste feedstock subjected to recycling processing undergoes injection molding, catalytic degreasing and sintering under the inert atmosphere or vacuum condition to obtain a final sample; and the flow index, theshrinkage ratio, the sintering density, the degreasing rate, the hardness, the green body density, the sintering density and the tensile strength of the stainless steel waste feedstock subjected to recycling processing and the sintered simple are tested, and finally the stainless steel injection molding waste recycled feedstock with qualified performance indexes is obtained.