Abstract: ‘Micui No.9’is developed by crossing‘HC3’（female parent）with‘PI6’（male parent）.It is a new variety of disease resistant,high-yield and high-quality thin-skinned melon.The plants exhibit vigorous growth,featuring cylindrical fruits with an average fruit weight from 500g to 550g.The fruit surface displays an ashen-white color overlaid with ink-green streaks,and the flesh is green with a soluble solids content ranging from 14% to 16%,showcasing excellent storage and transport durability.The whole growth period is 103-108days and the fruit development period is 30-35days.The variety demonstrates strong resistance to diseases and environmental stresses.It is suitable for protected-field cultivation in Shaanxi,Hebei,Shandong,Inner Mongolia,etc.