Potato is an annual herbaceous plant in the Solanaceae genus Solanum,with comprehensive nutrition,high yield,and strong stress resistance.China have abundant potato germplasm resources,and studying their genetic diversity can lay the foundation for the excavation of high-quality potato resources.The authors mainly summarized and prospected the genetic diversity of potato from four aspects:morphology,cytology,biochemistry and molecular level,aiming to pro-vide reference for genetic improvement,screening of excellent germplasm,cultivation of new germplasm,and utilization of potato germplasm resources.