Abstract: Five major training modules for tobacco-grading staff working in tobacco redrying factories were analyzed and summarized. Their tobacco-grading ability was tested via redried tobacco leaves during processing, then the staff was divided into a high-ability group and a low-ability group in order to fit their development with further two and three corresponding training modules, respectively. To find out the optimal training module to each group, the effects of the different training modules were compared by a normal fitting test and parametric/nonparametric test. The results showed that:1) Irrespective of practical or theoretical training, all the grading staff in the high-ability group could achieve expected training targets. The difference between the two training modules was small for this group. 2) The scores for the low-ability group were able to improve quickly through the training module 3 (integrating theory with practice), therefore the training module 3 was suitable for upskilling the grading staff in the production line.