The author established the relative carrying capacity of resources index system according to the characteristics of its resources in Xinjiang, in order to further comprehensively research the relative carrying capacity of resources, and improved relative carrying capacity of resources model based on the resource advantage drive and disadvantages constraint principle, joining the wetland resources and forest resources. Then, the relative resources carrying capacity of resources and the space difference of Xinjiang states (city) were analyzed by the improved model. The results showed that: the addition of natural wetland resources and forest resources and the relative carrying capacity of resources index system were studied from aspects of the relative carrying capacity of resources. The carrying capacity of resources from the horizontal comparison of view, economic resources capacity row in the first place, natural wetland resources capacity rowed at the bottom of that. Economic resources in Xinjiang was the development of relative advantage resources, and natural wetland resources in Xinjiang was the development of disadvantage the resource, which it accorded with the characteristics of the development of arid region. In Xinjiang, 15 ground state (city), the bearing status to serious overload of Shihezi City, Kashi, Hetian, Yili 4 regions, bearing status to very abundance of Bazhou, Karamay, Altay Region, Tacheng Region, and Changji, 5 areas. From the serious overload degree and very abundance degree contrast to see, Xinjiang around the state (city) presented population overload area overload degrees higher, the surplus population area surplus degree lower characteristics. The population was lower than the relatively comprehensive carrying capacity of all the additional state (city) the proportion of the number for 60%, these areas land area accounted for the 64% of the total area, Xinjiang area that most of the relative carrying capacity of resources condition was good, the future population development space larger.