The invention discloses a detection method of material-soaked tobacco after material addition, wherein the detection method includes the steps of installing a test paper roller onto a rolling device, so that the rolling device presses tobacco and rolls on the tobacco when the tobacco passes through a material discharge belt of a material and fragrance addition device, and then a material liquid on the material-soaked tobacco can be stuck on white tissue to form yellow stains, thereby determining whether the tobacco contains the material-soaked tobacco or not. The detection method is simple in operation, is convenient and quick to carry out, can easily detect and determine the material-soaked tobacco and can prevent the material-soaked tobacco or cigarette tobacco to enter follow-up processes.