Abstract: The arid and semiarid area in northwest China contains Qinghai province, Xinjiang Uygur autonomous region, Ningxia Hut autonomous region, west part of inner Mongolia autonomous region, north part of Shaanxi province, middle and west part of Gansu Province. There are many kinds of natural and mineral resources in this blue-chip area. But the ecological environment is fragile, and sustainable development is important in this area. An indicator system of evaluation on regional sustainable development in the arid and semiarid area of northwest China is put forward, and it consists of 5 subsystems. The first is about the status of natural resources and ecological environment, and it contains 5 indicators. The second is about economic development and resources consuming, and it contains 4 indicators: The third is about ecological environment treatment, and it contains 4 indicators. The fourth is about the level of people's life, and it contains 4 indicators. The fifth is about social progress, and it contains 4 indicators. Based on the indicator system, using Fuzzy mathematics method, an integrated evaluation model of regional sustainable development in the arid and semiarid area of northwest China is established. This model consists of two estates. One is evaluation model based on each subsystem of all kinds indicators, and the other is based on the system of all kinds subsystems. As an example for using the model, the situation of sustainable development in 11 regions is evaluated.

Key words: regional sustainable development, integrated evaluation, model, arid and semiarid area in Northwest China