Maize seeds and seedlings were treated with NaC1 and different concentrations of Ca(NO3)2+ NaC1, Then the physiological characters and morphological traits of seedling were analyzed to study the effects of calcium on the germination and seedling growth of maize. The results showed that NaC1 stress inhibited the germination and growth of maize, The soluble protein content and chlorophyll content of maize seedlings were decreased by 39.43% and 21.97%, MDA content was increased by 62.05%. The soluble protein content and chlorophyll content of maize seedlings were increased, and MDA content was decreased when adding different concentrations of Ca(NO3)2, so salt injury was significantly alleviated. When the concentration of Ca(NO3)2 was 20mmol / L, the mitigation to achieve the best.