‘Xinyou 64’ is a new medium-large watermelon cultivar which is selected from the cross-combination of 117-X×160-X.The growth period is about 83-87 days.The growth potential is medium，average seat melon section in the main cross section 15-17 or so.Its fruit type is oval.The peal is green in color with greenish black stripes，and the pericarp thickness is about 0.9-1.2 cm.The fruit flesh is red fine sandy and juicy.The soluble solids content is 11.5%-12.5%.667 m2 yield is over 5 t.It is not crack melons，shipping.It is suitable for small shed and open field cultivate in all parts of Xinjiang.