Bag outlet transverse cutting device of bag making machine

The utility model relates to the technical field of packaging bag preparation, and discloses a bag outlet transverse cutting device of a bag making machine. The bag outlet transverse cutting device of the bag making machine comprises a rack, a transverse cutting assembly, a detection assembly and an auxiliary assembly, a packaging bag to be transversely cut is conveyed on the rack, the transverse cutting assembly comprises a transverse cutting knife, the transverse cutting knife can be transversely and slidably arranged on the rack, the detection assembly comprises a grating transmitter and a grating receiver, and the grating transmitter and the grating receiver are both installed on the rack. The grating emitter and the grating receiver are in communication connection through a grating, an uneven packaging bag can block a communication path of the grating emitter and the grating receiver, the auxiliary assembly comprises a roller assembly, the roller assembly comprises a roller, the roller can make contact w