The invention discloses a screen mesh pressing device for a vibrating screen. The screen mesh pressing device comprises a screen mesh, first fixing plates, positioning blocks, second fixing plates, a screen mesh pressing block, third fixing plates, a screen mesh installation plate, a groove and positioning pillars. The left side and the right side of the screen mesh are both in pressing contact with the bottom of the groove in the screen mesh installation plate through the screen mesh pressing block, and the screen mesh pressing block is in clearance connection with the groove in the screen mesh installation plate; second threaded holes in the screen mesh installation plate are fixedly connected with first threaded holes in the first fixing plates through fastening bolts, and the positioning blocks are installed above both the left sides and the right sides of the rear ends of the first fixing plates; and the positioning blocks are fixedly connected with the positioning holes in the screen mesh pressing block through the positioning pillars, and the screen mesh installation plate is provided with the second fixing plates and the third fixing plates. By means of the screen mesh pressing device for the vibrating screen, the problem that much time is consumed in replacing a screen mesh is solved, the screen mesh pressing device is convenient to install, the screen mesh is convenient to replace, production continuity is not influenced, the time in replacing the screen mesh is saved, and work efficiency is improved.