The invention relates to the field of cydiodine product, in particular to a preparation method for a cydiodine buccal tablet and the cydiodine buccal tablet. The invention solves the problems that the cydiodine buccal tablet in the prior art has poor stability and serious environmental pollution, is not easy to implement industrial production, and the like, and provides a preparation method for a stable cydiodine buccal tablet and the cydiodine buccal tablet. The method comprises the following steps: preparing cydiodine, that is, adding KI and I2 into a solvent, stirring the mixture for complete dissolution, adding beta-CD into the solvent, reacting, filtering, and obtaining a solid; preparing taste improving agent; and preparing the tablet. The cydiodine buccal tablet prepared by the method has the advantages that the cydiodine buccal tablet has good stability, is easy to implement, and does not cause environmental pollution.