Abstract: In recent years, with the rapid development of dairy farming industry, Dairy Herd Improvement（DHI） technology is widely used in dairy farms. The DHI report provides information on feeding management, reproduction and mating, udder health,disease control, which renders guidelines for scientific management and mate selection, effective mastitis control and rational cow′elimination and is helpful for improvement of dairy cows production performance and economic benefit. A comprehensive and accurate explanation on DHI report is of great significance for practical problems solving in dairy farms and dairy herd improvement. We analyzed the crucial indicators in a DHI report from a dairy in Ningxia, so as to provide references for the application of DHI report in dairy farms.