Abstract: 52 Sichuan rape (Brassica napus L.) landraces and 24 varieties (Brassica napus L.) released in Sichuan province were used in the evaluation of the dormancy characterization. Results were shown as follows: the difference of the materials was significant at 0.05 level; There were few materials resistant to preharvest sprouting were recovered. The difference of the range and distributions of sprouting ratio and germination indexes was significant at 0.05 level between landraces and varieties but the difference of germination indexes was not significant. Compared to landraces, current varieties’ germination index tended to change in the low or high range. According to grain sprouting progress and germination index, the varieties were clustered into three groups, the first group was that germination peak value appeared at the first day; the second group was that germination peak value appeared at the first and second days; the third group was resistance to preharvest sprouting. Landraces were clustered into four groups, one group was that germination peak value appeared at the first two days, and another three groups were same to the ones above. This research showed information for future research on resistance to preharvest sprouting.