Salt stress severely inhibits the growth of plants, resulting in a decrease in crop yield. The germination period is the most sensitive phase for plants to salt damage. Therefore, establishing an accurate and convenient salt tolerance identification and evaluation system, as well as screening for salt-tolerant germplasm in Brassica napus, is crucial for enhancing the salt resistance of rapeseed varieties. In this study, the optimal concentration for salt tolerance identification during the germination period was determined to be 1.25% based on the salt damage index of 15 Brassica napus germplasms. At this concentration, the germination vigor, germination rate, root length, hypocotyl length, fresh weight, and dry weight of 186 Brassica napus germplasm resources were measured, and their salt tolerance indices were calculated. Conducting comprehensive salt tolerance assessment of rapeseed germplasm resources using analysis methods such as principal component analysis and membership functions. A salt tolerance comprehensive evaluation model was established, and suitable evaluation indicators were selected. The results showed that under 1.25% NaCl stress, there was a highly significant positive correlation among the relative germination vigor, relative germination rate, relative root length, relative hypocotyl length, relative fresh weight, and relative dry weight of Brassica napus. By employing principal component analysis, these six indicators were condensed into three principal components, which collectively account for a cumulative variance of 92.809%. Based on the weights of these three principal components, D values were calculated for various germplasms, resulting in the classification of 186 germplasms into four levels and the identification of five salt-tolerant materials. Furthermore, a mathematical evaluation model for salt tolerance identification in Brassica napus was established as D=0.111+0.201X1+0.165X2+0.381X5. The salt tolerance identification criteria and salt-tolerant materials chosen in this study have established the methodological and material groundwork for salt-tolerant rapeseed breeding.