[Objective]DHI is a comprehensive Technology used to manage dairy production. The analysis of DHI data can guide farm health planning,improve diet formulation and accelerate genetic improvement of dairy cows,improve the level of dairy breeding. [Method]In this paper,14024 DHI data were collected from a dairy farm in Guangdong province from January to December in 2022.These data were collected and analyzed. [Result]The average birth order was 2.34,daily milk yield was 32.03 kg,daily peak milk yield was 39.6 kg,daily peak milk yield was 80.17 days and daily milk yield was 9 641.55 kg in 305 days,the average percentage of milk fat was 4.52%,milk protein was 3.16%,lipoprotein to protein was 1.44,number of somatic cells was 333 000 mL,MUN was 10.9 mg/dL,days of lactation was 176.42 days. [Conclusion]The proportion of dairy with more than three births was low,the structure of dairy was unreasonable,the number of somatic cells was high and the content of MUN was unstable. The structure of dairy should be optimized,the environmental treatment,mastitis health monitoring shoud be strengthened adjust the diet structure.