The invention belongs to the technical field of tobacco cultivation and discloses a method for cultivating non-topped cigar tobacco of cigar by utilizing a male sterile line. The method comprises thefollowing steps: taking a male sterile line variety of a certain tobacco as a female parent, taking a cigar tobacco main cultivar of cigar as a male parent, and hybridizing to obtain F1-generation seeds; taking the F1 as a female parent, taking the cigar tobacco main cultivar of cigar as a recurrent parent, and back-crossing to obtain BC1-generation seeds; continuously back-crossing for five generations, and obtaining BC6 seeds, that is, the male sterile line variety of the cigar tobacco; transforming the sterile line variety of the cigar, taking the original cigar tobacco variety as a restorer, and breeding seeds for production of large fields; seeding the seeds for production, not topping the obtained tobacco plants after budding, picking leaves after proper maturity, harvesting and airing, curing the leaf tobacco, and fermenting. The method disclosed by the invention has the advantages that the tobacco obtained by the method is low in nicotine and nitrogen content and leaf tobacco thickness, topping is not needed in the cultivation process, lodging is prevented, and the production cost is greatly reduced.