The invention relates to an application of a natural plant extract in tobacco products, and specifically relates to a carum carvi and dried ginger composite extract, and a purpose thereof as a tobacco product additive. According to the invention, carum carvi and dried ginger are adopted as extraction raw materials. A polar solvent is adopted as an extraction agent, and an extraction reaction is carried out. An ethyl acetate extraction separation technology is adopted, such that extraction by-products are removed by separation. The feed liquid is then concentrated into an extract paste. The extract paste is subjected to vacuum drying, and residual solvent is removed. Obtained solid powder is the extract provided by the invention. With the extract provided by the invention, when a tobacco product is smoked, an effective aroma enhancing effect can be realized. The aroma is rich and clear. The composite extract can also provide the tobacco product with unique aroma tone and aroma harmony.On a basis that tobacco product taste is improved, negative influences such as miscellaneous gas introduction and irritation addition are avoided.