The present invention relates to a method for producing a high-quality filtration material by using waste walnut shells. The method comprises: sequentially carrying out high-temperature and high-pressure ultrasonic degreasing, drying, crushing, air separation, atmospheric pressure air breaking, color selection and other process steps on waste walnut shells. According to the present invention, the method has characteristics of reasonable process route, high automation degree, and low production cost; the reconfigurable modular technology is adopted as the core, the high-temperature and high-pressure ultrasonic degreasing, the drying, the crushing, the atmospheric pressure air breaking, the color selection and other key technologies are integrated to improve the inherent quality of the walnut shell filtration material, the technical steps such as air separation and color selection are performed to achieve the refining of the walnut shell filtration material and improve the sensory quality, and the research and development and the promotion of the technology provide positive significance for the fields of improvement of the walnut product added value, extending of the rural economy forestry and fruit industry planting chain, promotion of the walnut fruit industry deep processing industry development, and the like.