Abstract: 【Objective】The aim of this study was to screen out crack resistant and high-quality miniwatermelons under soilless cultivation in Lingshui of Hainan, which could meet people's demand for high-quality watermelons and promote the development of Hainan facility watermelon industry.【Method】In the greenhouses of Lingshui, all watermelons were planted by three-dimensional creeper cultivation method with pure coconut dust as cultivation matrix and nutrient liquid drip irrigation. With Meiyue as the control variety, the yield, fruit characters and quality characters of 21 watermelon varieties were compared and analyzed.【Result】Among all the watermelon varieties tested, the single fruit weight varied from 1.35 to 2.05 kg, and the yield varied from 1 799.4 to 2 727.3 kg per 667 m2, among which L600 had the highest single fruit weight and yield. The soluble solid content in the center varied from 9.9% to 12.9%, and that of Qiongxiang was the highest. The soluble sugar of watermelon was mainly fructose, followed by glucose, and the soluble sugar content was 54.94- 87.65 mg/g, among which Reyanmoyu was the highest. The sugar-acid ratio ranged from 20.22 to 53.41, among which Wanfulai was the highest. The range of rind hardness was 32.56-69.41 kg/cm2, and the rind hardness of the 10 varieties（Jinxiuqiancheng, Yanling, Jinxiangyu, Meirong, Qiongmei, Quanmei 2K, Quanmei 4K, 4126, 3416, L600）was significantly higher than that of Meiyue. Based on the average membership function values, the L600 ranked first, followed by the Jinxiuqiancheng.【Conclusion】Based on the comprehensive evaluation on indicators of yield, quality and pericarp characteristics, L600 and Jinxiuqiancheng with good quality and crack resistant were selected as watermelon varieties suitable for soilless cultivation in greenhouses in Lingshui of Hainan province.