In this paper, the effects of sorbitol chelated calcium on rape seed germination under NaCl stress were studied by controlling calcium sources (chelated and free calcium), the mixture ratio of two forms of calcium (different chelation rates) and the concentration of chelated calcium. The results showed that when the concentration of NaCl in the culture medium was 150 or 170 mmol/L, it seriously affected the germination and radicle growth of rape seeds. The addition of two forms of calcium significantly improved seed vigor and germination rate under NaCl stress, promoted the growth and elongation of radicle. Under NaCl concentration of 170 mmol/L, the addition of sorbitol chelated calcium with different chelation rates significantly increased the germination potential and germination rate of rape seeds, and the promotion order was 70%>0>40%>10%>100%. When the proportion of chelated calcium was 70%, the effect of promoting seed germination was better than single calcium nitrate or entire chelated calcium. Under NaCl concentration of 170 mmol/L, the addition of different concentrations of chelated calcium reduced salt damage, and seed germination potential of sorbitol chelated calcium was the largest with Ca²⁺ concentration of 0.897 g/L; at the end of germination, the radicle length of seedlings treated with sorbitol chelated calcium was the longest with Ca²⁺ concentration of 0.577 g/L. When Ca²⁺ concentration was further increased, the promotion effect would be reduced. In conclusion, soaking seeds with sorbitol chelated calcium under salt stress can reduce salt damage. The coexistence of chelated and free calcium in the ratio of 7:3 has the best effect on promoting rape seed germination under salt stress, and low concentration of chelated calcium has a better effect on promoting rape seed germination under salt stress.