The invention relates to a feeding method in processes of tobacco leaf threshing and re-drying. Feed liquid is selected according to quality characteristics of tobacco leaves and added into a moisture regain section of a re-drying machine according to the 0.4% proportion of tobacco leaf weight, high-pressure water is used for carrying the feed liquid to be sprayed on the tobacco leaves of the moisture regain section after sprayer nozzle atomizing, and the temperature at the moisture regain section is controlled to be 55-65 DEG C. The feeding method is even in feeding, high in feed liquid utilization rate and good in feeding effect and keeps a biological agent active, and therefore the purposes that tobacco leaves are safely stored, the quality of the tobacco leaves is improved, and use value of the tobacco leaves is improved are achieved. The feeding is performed on the moisture regain section of the re-drying machine, so that feeding evenness and tobacco lamina safety are guaranteed.