| Since20th nineteen Nineties the global economy has entered a rapid development of knowledge, science and technology, with the development of the international economy, the accelerating process of global economic integration, more and more enterprises to participate in international competition in the market, the domestic market is also facing the competition from domestic and foreign enterprises. So how in the incentive market competition is an important aspect of has been concerned by enterprises, for enterprises to obtain competitive advantage is to create dependence of core competence, and the core competitiveness of enterprises one is dependent on the quality of the products and the image of the enterprise, on the other hand is the price of the product. The enterprise product prices are determined by the production cost of enterprise products, the production cost of enterprises are mostly the cost of raw materials, the cost of raw materials is determined by the purchase prices of raw materials, the purchase price low, raw materials of good quality, enterprise products have price competitive advantage. The procurement of raw materials is the first step of enterprise production, has the important influence to the enterprise product prices.In this paper, combined with the material procurement characteristics of Nanjing Metro Inc, based on introducing the related theory about purchasing process management at home and abroad, the purchasing management under supply chain. By introducing the procurement status of Nanjing Metro Inc, the current procurement flow analysis, the implementation of purchasing plan duty is expounded, and the Metro Inc in Nanjing procurement methods such as competitive negotiation, inquiry mode, single sourcing and purchasing method suitable for such material types are described, from induction the purchasing process purchasing sub process is not effectively controlled, the procurement process time without management methodology specified, the procurement of goods storage management is not scientific and non scientific issues such as procurement. Design of Nanjing Metro Inc purchasing process from problem, from the procurement organization system design, procurement contract approval and implementation, the establishment and implementation of procurement and procurement management classification optimization aspects of process design, and the implementation steps and preparation, on the implementation of the procurement process project implementation difficulties and solutions, organization in the implementation of the program were to improve overall, and evaluating the effect of optimization of purchasing process of Nanjing Metro Inc. |