The aim of this experiment is to find the optimum small fruit watermelon cultivation methods on conditions which used“two vine and one line”in spring greenhouse. The author has studied the different cultivation density. The results showed that the optimum cultivation density was 2 300 plants per 667 m2 with two rows pattern, using the pruning modes of“two vines and one line”. In this cultivation density condition, small fruit watermelon can get the highest yield of 4 327.86 kg per 667 m2 and 288.52 kg per plot. The weight of single fruit (1.72 kg) and the highest center sugar content (13.20%) were the highest. The harvesting time was June 1 which ranked as no. 2, and the fruit setting rate was 109.4%which ranked as no. 3. The deformed fruit rate of 0.78%was the lowest. Thus this cultivation density was the optimal density, and has wide extension prospects.%为筛选出北京地区春大棚小型西瓜在“2蔓1绳”高密度栽培条件下的最佳栽培密度，对不同种植密度进行比较试验。结果表明，在“2蔓1绳”整枝方式双行种植情况下，每667 m2定植2300株产量最高，为4327.86 kg；小区产量最高，为288.52 kg；中心糖含量最高，达到13.20%；始收期为6月1日，排名第二；坐果率为109.4%，排名第三；单果重最高，为1.72 kg；畸形果率较低，为0.78%。由此可见，每667 m2定植2300株为最佳栽培密度，具有较好的推广应用前景。
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