Hollis Chenery pointed out that the change trend of the proportion of the three industries is generally from "one two three" to "two one three" or "two three one", and then to "three two one". From the output value of the three industrial structures in Hunan Province in recent 40 years, it is basically in line with this trend and is steadily moving towards "three two one". Combined with the current situation of industrial investment layout in Hunan Province and the 14th five year development plan of Hunan Province, it is possible to see the trends of industrial development in Hunan Province, such as the continuous improvement of industrial economy, the service industry becomes the industrial pillar, the rapid development of advanced manufacturing industry, the leapfrog development of agricultural modernization, and the development and growth of cultural industry.