The invention discloses a three-stage six-step baking technology for flue-cured tobacco in a common flue-curing barn, and belongs to the technical field of modulation of flue-cured tobacco. The technology mainly comprises three baking stages, namely a yellowing stage, a color fixing stage and a stem drying stage. The technology is characterized in that: the yellowing stage comprises three key temperature and humidity steps; the color fixing stage comprises two key temperature and humidity steps; and the stem drying stage has a key temperature and humidity step. The whole braking process has the three baking stages and the six key temperature and humidity steps, and the temperature and the humidity in the flue-curing barn are controlled in the temperature and humidity ranges required by the corresponding steps of the six key temperature and humidity steps according to the change conditions of tobacco leaves, so that the aim of regulating and controlling the baking process of the flue-cured tobacco is fulfilled, a good effect is achieved, the destroyed tobacco such as green impure tobacco and the like is obviously reduced, the proportion of orange tobacco and high-grade tobacco is improved, the flue-cured tobacco has a loose structure, the oil content of the flue-cured tobacco is increased, and the inner and outer view quality and the availability of the tobacco leaves are remarkably improved.