The invention provides a carton cutting device. The carton cutting device includes a base, a cutting table is arranged on the base, air intake small holes distributed evenly are formed in the surfaceof the cutting table, a vacuum pump is arranged in the base, a PVC tube is connected with the vacuum pump and connected to the inner cavity of the cutting table, a bracket is arranged at the upper endof the base, and symmetrical motor supporting brackets are arranged on the bracket; and a first motor and a second motor are arranged on the motor supporting brackets respectively, the output end ofthe first motor is connected with a left rolling roller, the output end of the second motor is connected with a right rolling roller, cutting blades are arranged on the left rolling roller and the right rolling roller, a control end is arranged on the front end face of the base, the first motor, the second motor, the vacuum pump are electrically connected with the control end, the cutting blades on the left rolling roller and the right rolling roller are arrayed in a staggered mode, and the vacuum pump is connected with the PVC tube through a threaded air pipe connector. Therefore, a carton iscut through the combination of the gravity and a cutting knife to obtain a flat cutting opening, and the smoothness of the cutting edge is met.