Abstract: After analyzing the resource structure,agriculture specie structure,industry structure and spatial structure,this paper studies the energy flow,material flow and capital flow in representative oasis Agriculture Eco-Economy System in middle and lower reaches of Xinjiang Tarim river.The results reveal the following facts in Yuli county.As to the energy flow,the energy production in cropland ecologic system is low-level and inefficient.In the course of cropland production ,input man-made energy and organic energy is the main factor to affect the transformation and production.As for the material flow,the structure of manure used is not diverse , fertilizer is the main manure.What's more,the fertilizer used is beyond the endure limit to soil ,which results to the unbalance of soil nutrient.For the capital flow ,the ratio of input-output is high in the capital flow of Agriculture Eco-Economy System ,which means that Yuli agriculture production is still in the phase of farm crops production .There are many reasons to cause the Agriculture Eco-Economy System lower function,such as the reasonless of industry structure,the lowness of productivity level,the lack of the capital and so on.

Key words: Yuli county, Agriculture, Eco-Economy System, structure and function