Abstract: The reserve resource of cultivated land is an important guarantee for the implementation of the balance of cultivated land occupation and compensation. Xinjiang is located in the inland of northwest China, with a relatively lower level of land development. It is the main district where China's cultivated land reserve resources are concentrated. Its utilization potential is huge. According to the actual situation in Xinjiang, the principal component analysis method and the coupled model were used to explore the coupling degree and influence mechanism between the cultivated land reserve resources and the ecological environment. The results showed that there was a significant spatial difference in the distribution of cultivated land reserve resources in Xinjiang. The ecological environment index of each region was generally low. Most of the cultivated land reserve resources were classified into medium and severe imbalance development types. Changji, Altay and Tacheng regions had better coupling degree. Finally, according to the special geographical types and huge ecological pressures in Xinjiang, it was proposed to evaluate the impact of resource development on local ecology first before development.

Key words: cultivated land reserve resources, ecosystem, coupling, Xinjiang