The invention discloses a cement grinding and screening device. The cement grinding and screening device comprises a treatment frame, wherein supporting frames are symmetrically installed at the bottom of the treatment frame, a base is installed at the ends, away from the treatment frame, of the supporting frames, one side of the treatment frame is communicated with a material pushing pipe, and a dustproof cover is installed at the end, away from the treatment frame, of the material pushing pipe; a feeding port is formed in the side, away from the supporting frame, of the treatment frame, a sliding cover is connected to the position, close to the feeding port, of the inner wall of the treatment frame, a handle is installed at one side of the sliding cover, a discharging port is communicated with the side, away from the material pushing pipe, of the treatment frame, and a screen is fixedly connected to the position, close to the discharging port, of the inner wall of the treatment frame; and a hole cleaning device is mounted at the position, close to the treatment frame, of the inner wall of the treatment frame. According to the cement grinding and screening device, the purpose of effectively crushing large particles of cement raw materials is achieved, and it is guaranteed that the sizes of the particles of the cement raw materials are small, so that the particles are easier to use.