The water resource is deficient in Minqin County, the ecological environment is fragile, the development of agricultural production is severely limited, it’s difficult to raise farmers' income, so taking water-saving irrigation technology is necessary. Under the market economy background, the task about water-saving irrigation technology is arduous. The paper is mainly based on interview and case analysis, the purpose is to explore the spread condition and process of water-saving irrigation techniques in the rural communities, to find out the predicament and solutions of the diffusion of technology. The paper showed that the problems existed in single diffusion model, in low-status of the participation farmers and so on. The farmer field school was an effective way of dissemination and promotion of water-saving irrigation technology, people also needed to improve the water-saving irrigation technology dissemination mechanism, attracted women to participate and take children into the diffusion of technology in the education system.