The invention discloses a double-power unidirectional motion bone nutrition extractor which comprises a main handle seat, a main rotating roller, a unidirectional rotating power part, a unidirectionalsliding power part and a main sliding roller. The main rotating roller is arranged at the end of the main handle seat; the portion, on the side of the main rotating roller, of the main handle seat isprovided with the unidirectional rotating power part which unidirectionally drives the main rotating roller to rotate, the main handle seat is provided with the unidirectional sliding power part sliding unidirectionally, and the unidirectional sliding power part is provided with a main sliding roller which is matched with the main rotating roller to extrude materials. According to the invention,the tool can continuously roll and extrude the bone from one end through unidirectional rolling and sliding, so that the nutrient substances are extruded from the other end, the double-power unidirectional motion bone nutrition extractor is convenient to use, is suitable for a person to eat and is beneficial to fully utilization of the nutrient substances in the bone.