Smoked sheet cutting device

The utility model discloses a tobacco flake cutting device, the blade angle of a cutting knife is changed into a left arch shaped blade angle and a right arch shaped blade angle. A Trinacriform knifepoint is arranged in the center of the right and the left circular arc shaped blade angles, the blade angle of the knifepoint is the extension of the horizontal line of the blade angle of the cutting knife and is tangent with the arc shaped blade angles at both sides. A cutting board is arranged at the lower side of the cutting knife, a knife edge groove is arranged at the front end of the cutting board, an arch shaped underboarding which is corresponding to the left and the right arch shaped blade angles is arranged at the front bottom end of the knife edge groove. The utility model enables the knife edge groove of the cutting board which is installed on a discharging arm to match well with the cutting knife, and enables the cut tobacco block to smoothly fall into a guide plate and not to be stuck.