Abstract in the now market competition, the enterprise must be able to the market which changes unceasingly to make the fast response, is improving the product quality, to reduce the cost, the improvement service, is specially in aspects and so on renewal product has the competitive advantage, can survive and the development. Because the enterprise many kinds of reasons have the goods in stock, the cause stores goods in the enterprise Business gross asset often the cover has the great proportion particularly, but, the enterprise will have stores goods will also have the massive costs, therefore, one of inventory management into business finance management difficult questions. This article passes the advantage special-purpose automobile Limited liability company take Shanxi as the object of study, uses determines the nature of with the quantitative analysis, from the shallow to the deep unifies the analysis method, through to the inventory management pattern and the goods in stock mathematical model's introduction and the research, the union company special details, finds the problem, the perfect enterprise stores goods system's construction. This article introduced some company present inventory management condition as well as affects its factor, and through studies a series of raw materials, in the product and the finished product stock turn mathematical model, discovered the influence handling speed the factor, this article studies the result strengthens the inventory management to the enterprise, raises the fund utilization ratio, the acceleration turnover of capital, raises the economic efficiency to have certain economic significance. key words: Stock inventory management stock turn goods in stock model