Along with the computer hardware and software to continuously improve and the performance of the price going down, machine vision technology more and more application in agricultural product quality inspection and grading field. The characteristics of the machine vision technology is speed, information and multi-function, can complete the grading of the size, shape, color, defects, and many other. Apples and other fruits at home and abroad are relatively mature, however, due to growing location, dried jujubes machine vision grading is few studied. This article mainly discusses the choice of dried jujubes background and size detection. The results show that at the same time ensure enough in production, sorting accuracy can reach 80%-85% or so. Machine vision also apply to dried jujubes real-time classification.