The invention discloses a method for raising the seedlings of Zimbabwe KRK26 tobacco in a floating way. The method comprises the steps of selecting a field, filling matrix in nursery trays, preparing nutrient solution, sowing seeds, implementing seedling management, applying fertilizer and growing into the seedlings; the specific steps are as follows: selecting an open flat field which has the characteristics of wind resistance, sunny exposure, low underground water level, adjacent clean water source and convenient traffic, and building a nursery shed at the temperature of 15-30 DEG C inside during the nursery period and a nursery pool; preparing nursery matrix dominated by grass carbon as a main raw material, and filling the nursery matrix in the nursery trays; pouring pH6.0-7.5 water into the nursery pool till being 7-15cm deep; selecting the sowing date to be 60-75 days in advance of transplanting to a big land, sowing 1-2 pelleted germinating seeds into each nursery tray by the adoption of a mechanical sowing way, and then floating the nursery trays in the nursery pool; during the seedling period, inspecting for the filling of the seedlings in gaps, cutting leaves, hardening the seedlings and applying the fertilizer. As for the seedlings of the KRK26 tobacco, which are cultivated by the method, the grown-up seedling rate is more than 95 and the strong seedling rate is more than 90%; a single plant has 6-8 leaves and is of 10-15 stem height and 1.8-2.2cm stem girth; the seedlings of the tobacco are strong without diseases and pests; leaves are in normally green; root systems are developed well; stems are good in flexibility; the seedling colony of the tobacco is uniform and tidy.