The embodiment of the invention provides a longitudinal paper feeding device. The longitudinal paper feeding device comprises a first side plate and a second side plate and further comprises a drivingrotary shaft, a paper conveying rotary shaft and a paper sucking beam arranged between the first side plate and the second side plate. The first side plate and the second side plate are arranged in parallel; and the two ends of the driving rotary shaft, the two ends of the paper conveying rotary shaft and the two ends of the paper sucking beam penetrate through the first side plate and the secondside plate. According to the longitudinal paper feeding device provided by the embodiment of the invention, paper is fed in the vertical direction, and adsorbed paper sheets can be separated under agravity action, so that the occurrence of the phenomenon that die cutting paper sheets do not meet the standards so as to get stuck is avoided, and the working efficiency of a die-cutting machine is improved.