Efficient and energy-saving pressure screen for paper pulp screening

The utility model relates to the technical field of papermaking, and provides an efficient energy-saving pressure screen for screening paper pulp, which comprises a base, a shell fixedly arranged on the base, a screen cylinder arranged in the shell and a rotor arranged in the screen cylinder, and the rotor is rotatably connected to the base through a driving device; a feeding pipe, a slag discharging pipe and a slurry discharging pipe are arranged on the shell, the feeding pipe is communicated with a gap between the screen cylinder and the rotor, the slag discharging pipe is communicated with a gap between the screen cylinder and the rotor, and the slurry discharging pipe is communicated with a gap between the shell and the screen cylinder; a cleaning device is arranged on the screen cylinder and comprises a follow-up rod and a brush fixedly arranged on the follow-up rod, and the brush makes contact with the inner wall of the screen cylinder. A groove is formed in the screen cylinder, a protruding block is ar