Investigating the fluctuation law of the regional garlic industry＇ s planting acreage and marketing price by a way of difference equation and regression analysis, some practical results are received ： the associations between the garlic＇s price and the demand and supply are all close to be linear, the formal one increasing progressively while the latter one decreasing progressively; The fluctuation law of price and yield has three situations including the stable pattern, divergence form as well as enclosed type; The garlic industry＇ s price and planting acreage fluctuation approach a enclosed circulation, which is needed to take a measure of a comprehensive reform to make it tend to be stable gradually.