Abstract: To select the salt-tolerant submerged plants in coastal and saline-alkali wetland restoration, we studied the salt-tolerance ability and 4 physiological indexes of 6 kinds of submerged plants commonly used in water, including Vallisneria natans, Hydrilla verticillata, Ceratophyllum demersum, Myriophyllum spicatum, Potamogeton pectinatus and Najas minor. Under the condition of indoor simulation, we carried out salt stress on the 6 kinds of submerged plants with NaCl solution of different concentrations, observed the salinity symptom every week, and determined the content of chlorophyll a, b, proline, soluble protein and MDA in leaves. The results showed that: among these plants, the salt-tolerance ability was Najas minor>Potamogeton pectinatus> Ceratophyllum demersum>Vallisneria natans, Hydrilla verticillata>Myriophyllum spicatum. Najas minor and Potamogeton pectinatus could survive in salinity of 15‰ and 8‰ , the lethal salinity of Ceratophyllum demersum was 6‰, while Vallisneria natans and Hydrilla verticillata had a week salt-tolerance ability, whichwas 4‰ , and Myriophyllum spicatum had the worst salt-tolerance ability, which could only survive under salinity of 2‰. This study provides a basis for water ecosystem restoration in coastal and salinization areas, and lays a foundation for project practice and salt-resistant physiology research of submerged plants.