In China, the research on-fresh agri-products supply chain is limited and differentiates to manufacturing goods or materials: depending upon the complexity of their biologic properties and marketing properties. An inventory model is-studied for both deteriorating and ameliorating when the items stay in the distribution systems. For such instance, deteriorating and ameliorating happens consecutively depending upon the time of dealing. In a single harvesting-selling cycle, a theoretical model is,given on FIFO policy and such model can be extended to all fresh agri-products inventors optimization.