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The paper researches on the patt of man-land relationship of artificial oasis in the east of north Tianshan Mountain, the development of Qitai artificial oasis and its relationship with environment, analyzes the factors influencing the change of Qitai artificial oasis and economic growth through grey analysis, and suggests the approaches of sustainable development of Qitai artificial oasis. Research shows that the patt of artificial oasis and its environment had gone through three phases: the relatively harmonious stage, the unharmonious stage, and the new fragile balance stage. It also shows that the garden and the shelter-forest are useful to the sustainable development of Qitai oasis according to grey analysis.