Abstract：A new watermelon F1 Hybrid‘Aineng No. 5’ is bred by crossing inbred lines XM12 as female parent and XL10 as male parent．Its plant has strong growth vigor with good bifurcation ability.It is easy to bear fruit．The fruit is of oval shape．Its peel is black in color．The single fruit weight is 4-7 kg．The fruit rind is about 1.1 cm thick．The flesh is bright red in color and succulent with high quality and good flavor．The soluble solid content in the flesh core area is about 10%．It is about 32 days from female flower open to fruit ripening，and the whole growing period is 93 days．It is high resistant to Fusarium wilt，and resistant to blight and anthracnose．It is suitable to be planted in Hunan Province and its periphery regions.
