Abstract: In order to promote the perennial planting of Cenchrus fungigraminus in the Arid Valley of Dadu River, and explore the optimal stubble height, the growth traits and rejuvenation of Cenchrus fungigraminus after treatment in artificial intelligence greenhouse were observed, the unleveled Cenchrus fungigraminus were used as control. The results showed that, stubble treatment could promote the better growth of Cenchrus fungigraminus. After 45 days of stubble, the leaves and stems of Cenchrus fungigraminus with the stubble height of 20 cm grew optimally, and were suitable for use as feed. The Cenchrus fungigraminus with the stubble height of 5 cm had the largest number of tillers, which were suitable for soil and water conservation and ecological restoration. Cenchrus fungigraminus with the flat stubble height of 15 cm and 10 cm grew normally, and the Cenchrus fungigraminus with the flat stubble height of 0 cm had the worst growth and were not suitable for stubble selection.