With the development of China 's social economy and the continuous improvement of people 's living standards, dairy products with high nutritional value are deeply loved by people, and the dairy industry has ushered in new opportunities and challenges. The upgrading trend of dairy consumption in China is obvious. Consumers pay more and more attention to the quality of dairy products, pay more attention to nutrition, health, function, taste and so on, and promote the intensification of industry competition. Xinjiang Tianrun Dairy Co., Ltd. ( referred to as " Tianrun Dairy " ) as the largest dairy producer in Xinjiang, how to expand market share, improve their profitability is particularly important. This paper uses DuPont analysis method to analyze the five-year financial data of Tianrun Dairy Industry from 2019 to 2023, and puts forward relevant suggestions on the problems existing in its profitability, aiming to help Tianrun Dairy Industry improve its profitability, better cope with market competition, and also provide reference for the development of dairy products.