Abstract: The paper analyses the environment characters of the Loess Plateau in Gansu Province with an area of 113 thousand square kilometers, which includes fragile ecosystems, water resource shortage, heavy loss of water and erosion of soil, low vegetation coverage, high soil cultivated index and intense population and land pressure. The human activity in the region is accelerating the environment deterioration. Based on the analyses, the strategy for ecological construction and the mode for sustainable agriculture development are put forth in the paper. The strategy includes implementing forest, bush and grass projects to enlarge vegetation coverage, constructing high-efficiency rain-collecting and water-saving projects and adjusting agriculture structure to develop agriculture with local specialties and advantages. In addition, the agriculture of the Loess Plateau in Gansu Province Should adopt the sustainable development mode. The Loess Plateau in Gansu Province can be classified as four kinds of basic eco-ecological zones, which include water-soil preservation zone, mountainside water-soil preservation and economic zone, basic farmland zone and upland high-efficiency economical zone. Based on the local conditions in the zones, various countermeasures should be taken to realize the sustainable development in the region.

Key words: Loess plateau in Gansu Province, ecological construction, sustainable agriculture development