The utility model discloses a winter jujube grading plant based on machine vision, including feed mechanism, conveying mechanism, image acquisition unit, mechanism and the control unit blow, feed mechanism, image acquisition unit and blow the mechanism and follow conveying mechanism's direction of delivery sets gradually, feed mechanism includes big silo and feeding hopper, big silo and feeding hopper intercommunication, the bottom of feeding hopper is equipped with the jujube mouth, conveying mechanism includes along the conveyer belt of winter jujube direction of delivery setting and arranges in proper order and is in pick up the jujube box on the conveyer belt, the upper portion of picking up the jujube box is uncovered, the utility model provides a winter jujube grading plant based onmachine vision, novel structure, can acquire the different surface image information of winter jujube, the mode of utilizing the air -blowing sorts the accuracy that has both increased the letter sorting, has reduced the mechanical damage among the sorting processes again, can realize automatic quick nondestructive test, can avoid the artifical influence that detects the human factor, improve andselect separately the quality.