In order to explore the characteristics of industrial evolution in agricultural parks, using the typical case analysis method, taking the Dali Agricultural Park in the traditional agricultural area of northwestern China as an example, starting from the output value and type of enterprises in the park, using Moore structure model to trace the industry evolution process of Dali Agricultural Park, analyzing how to upgrade the industrial structure of agricultural park and drive economic growth. The results showed that the industrial integration of Dali Agricultural Park has process and stage, and the focus of industrial development was shifted sequentially from primary industry to secondary industry and then to the tertiary industry, and gradually showed the trend of integrated development of the primary,secondary and tertiary industries. In addition, cultivating agriculture-related manufacturing industry and service industry enterprises was the key to the upgrade the park industry. Therefore, in the subsequent development, Dali Agricultural Park should maintain the proportion of agriculture-related enterprises and output value above 70%. Under the trend of three industries integration and development, Dali Agricultural Park should gradually form an industrial layout of "high-end inside, base outside", promoting the integrated development of garden, village and town.