The invention relates to a method for preparing softly magnetic granules for injection molding. The method comprises the following specific steps: coupling softly magnetic powder by using a proper amount of coupling agent, drying, crushing and screening; mixing the coupled powder and resins according to the formula, and mixing and granulating by virtue of a twin-screw extruder, thereby obtaining the softly magnetic granules for injection molding; and finally, performing injection molding, thereby obtaining the product. Under the condition that the magnetic conductivity requirement is met, compared with the traditional softly magnetic product sintering process, the injection molding production process has the advantages that the production efficiency is high, products of complicated shapes can be produced, the dimensional accuracy of the product is high, the production cost is low, and the like.