The invention discloses a selenium-rich buccal cigarette and a preparation method thereof. The selenium-rich buccal cigarette is prepared from the following components in parts by weight: 10-20 parts of polysaccharide selenate, 0.5-2 parts of nicotine, 1.5-5 parts of tobacco leaf molecular distillate, 40-60 parts of xylitol, 5.7-9.9 parts of maltitol, 3-10 parts of gelatin, 0.2-1 part of edible essence, 0-0.1 part of food colouring, and 10-50 parts of purified water. The preparation method comprises the following steps: firstly dissolving the gelatin in water, mixing the gelatin solution with the polysaccharide selenate, the nicotine and the tobacco leaf molecular distillate, then mixing the mixing solution with syrup prepared from the xylitol and the maltitol, adding the essence and the colouring into the mixture, heating, uniformly mixing, then pouring into a mold, and finally demolding. The selenium-rich buccal cigarette has the advantages that no second-hand smoke is generated, so that the health of people around a smoker is not influenced; the selenium-rich buccal cigarette is convenient to carry, and the smoker is not limited by the environment or place when smoking the cigarette; and the buccal cigarette is rich in selenium, so that the special requirements of consumers on nicotine are met when the consumers smoke the cigarette, and moreover, the microelement selenium needed by the human body is also supplemented.