The utility model discloses a flow guiding device for a leaf blade and cut tobacco charging machine. The flow guiding device is mainly composed of a roller, a material liquid nozzle arranged at a material inlet end of a roller body and a flow guiding device arranged in the roller body. When the roller is unfolded to be in a plane state, the flow guiding device is mainly composed of a plurality of columns of flow guiding plates parallel to each other, each column of flow guiding plates are composed of a plurality of flow guiding plate single bodies arranged at intervals, and a fixation track of the flow guiding plate single bodies forms an inclined angle with the axis of the roller. Each flow guiding plate single body is composed of a flow guiding plate body where a pull nail is fixed, and the pull nail is protruded out of the flow guiding plate body. Intervals among each column of the flow guiding plate single bodies correspond to an adjacent column of flow guiding plate bodies on the same vertical plane. The flow guiding device can effectively improve effectiveness and uniformity of material feeding, can effectively reduce adhesion of materials in the roller body, reduces tobacco consumption and remarkably improves product quality and physical quality.