The invention discloses a cigarette paper additive with effects of sweet aftertaste and throat moistening and an application of the cigarette paper additive. Rose honey, phenylethyl alcohol, phenethylpropionate, phenethyl formate, vanillin, ethyl vanillin, rose flavone-U, royal jelly, propylene glycol, beewax essential oil, rose essential oil, a phyllanthus emblica extract and water are uniformlymixed to obtain a product, wherein the rose flavone-U is a novel flavonoid compound separated from waste residues of production of rose essential oil, has the following structural formula shown in the description, and is named 7-(3-hydroxypropyl)-8,2'-dimethoxyflavone. In the preparation process of the cigarette paper, the additive is applied according to 1-2% of the weight of the cigarette paper. The sweet and humid feeling of cigarette smoke is obviously enhanced, the smoke is smoother when passing through a throat part, the throat irritation is obviously reduced, and the throat comfort during cigarette smoking can be remarkably improved. According to the invention, the use amount of the additive is small, the addition process is easy to realize, the influence on the chemical balance ofthe cigarettes is small, and obvious change of the style of the cigarettes is avoided.