Selecting three typical Chenopodiaceae annuals (Bassia dasyphylla, Salsola ruthenica and Halogeton arachnoideus) as study subjects in a typical desert-oasis ecotone in the Hexi Corridor, we investigated the effects of different concentrations of salts (NaCl and NaHCO₃, 0, 50, 100, 150 and 200 mmol/L) on the growth, reproduction and biomass allocation of three Chenopodiaceae annuals. The results showed that(1)Survival rates of three Chenopodiaceae annuals decreased with the increase of salt concentration under sodium salt stress. Bassia dasyphylla and Salsola ruthenica could not survive or had very low survival rate under 200 mmol/L NaCl and 200 mmol/L NaHCO₃ stress, and Halogeton arachnoideus could not survive under 200 mmol/L NaHCO₃ stress. (2) Sodium salt stress significantly affected the growth and biomass accumulation of Salsola ruthenica, but certain salt concentration (50 and 100 mmol/L) could promote the development of Bassia dasyphylla and Halogeton arachnoideus, while higher salt concentration could inhibit their growth. (3) The root shoot ratio of the three plants decreased with the increase of salt concentration. The aboveground biomass allocation showed an upward trend with the increase of salt concentration. Among them, the reproductive distribution increased under low-salt stress (50 and 100 mmol/L), and the biomass allocation of stems and leaves increased under medium and high salt stress (150 and 200 mmol/L), while the roots biomass distribution decreased with the increase of salt concentration. It showed that increasing biomass allocation in the aboveground under salt stress is one of the ways of Chenopodiaceae annuals responded to salt stress. (4) The stress effect of NaHCO₃ was stronger than NaCl. The saline tolerance capacity of Halogeton arachnoideus was the highest among the three plants, and the capacity of Bassia dasyphylla and Salsola ruthenica was poor.