This article studied the clone growth ofHydrocotyle vulgaris and the characteristics of the vivo accumulation of Na+, K+ under salt stress in the artificial climate box, selecting theH. vulgaris with the same growth condition as experimental materials. The research results showed that when the concentration of NaCl was more than 3.0 g/L, the growth ofH. vulgaris was significantly suppressed. When concentration of NaCl was up to 5.0 g/L, the reduce percentage ofH. vulgaris growth index respectively was such as number of inflorescence (87.06%) > inflorescence biomass (82.61%) > leaf biomass (59.26%) >whole biomass (58.60%) > number of leaf (58.27%) > root biomass (58.33%) > stolon biomass (51.22%) > number of stolon internode (27.10%). When the salinity was within the scope of 1.0 ~ 5.0 g/L, besides the significant volatility of leaf weight ratio , stem weight ratio, root weight ratio and flower weight ratio were no obvious change, which showed that theH. vulgaris can adapt to the changes in salinity through internal adjustment mechanism. The concentration of Na+, K+ in root, stem and leaf was respectively rising and falling with the increase of salinity. Correlation analysis indicated that the concentration of Na+, K+ in root, stem and leaf was significantly negative correlation.%选取长势一致的香菇草（Hydrocotyle vulgaris）为实验材料，在人工气候箱内，研究了盐胁迫下香菇草克隆生长及体内Na+、K+积累的特性，结果表明，当NaCl浓度>3.0 g/L时，香菇草的生长显著受到抑制，在NaCl浓度为5.0 g/L时，香菇草各生长指标降低的百分率分别为花序数（87.06%）>花序生物量（82.61%）>叶生物量（59.26%）>整株生物量（58.60%）>叶片数（58.27%）>根生物量（58.33%）>匍匐茎生物量（51.22%）>节间数（27.10%）；在盐度为1.0~5.0 g/L，除了叶比重有显著波动以外，茎重比、根重比和花重比并没有明显变化，表明香菇草可以通过内在调节机制适应盐度的变化；根、茎和叶中的Na+、K+随着盐度的增加，分别表现上升和下降趋势，相关分析表明，根、茎和叶中的Na+、K+间分别呈现极显著负相关。
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