Abstract: Water Resources development plays a key role in the ecological environment of inland river basins of arid and semi-arid zone in Northwest China.According to experimental observation,it is clear to see that growth of natural plants have a close relation with local groundwater level.A good ecological system in the oasis of the zone is the precondition for sustainable development,therefore,the water resources development and ecological environment protection should be integrated in one system in the Grand Western Development.As a case study,the egulation and relationship of water resources development,irrigation area arrangement and oasis evolution have been analyzed in Minqin,the downstream of Shiyang River in Hexi Corridor of Gansu Province(It will provide the foundation of analysis for rational irrigation and environment protection in Minqin Basin).