Abstract: ‘Ziding Xiuli’ is a new mid ripening variety watermelon developed by Institute of Agricultural Research 6^th Branch of XPCG,the 298 X as the female, the 160 X as male hybridization breeding of watermelon varieties.It can be harvested about 87 days after sowing.Fruit development period is 29 days, has medium growth potential.The first female flower appears in the node which belongs to 8^th to 10^th of the main vine, and the average fruit setting position is usually in the node which belongs to 13^th to 15^th of the main vine.The fruit is oval, and the fruit type index is 1.2.The peel is green, covered with dark green strips, and the average thick skin is 1 cm.The flesh is red, crisp and juicy texture, excellent flavor, the soluble solids content in the center is about 12%.The seeds are oval, yellow and brown color shell, easy to fall off, and thousand seed weight is 45.5 g.The average single fruit weight is 5 kg, it does not crack melons, is resistant to storage and transportation and is suitable for early spring and open field cultivation in Xinjiang.