Computer screen device with dust removal function

The computer screen device with the dust removal function comprises a shell and a display screen on the front face of the shell, rectangular frames are fixedly connected to the left side and the right side of the shell, positioning plates are fixedly connected to the upper surface and the lower surface of each rectangular frame, and positioning bolts are in threaded connection to the side faces of the positioning plates; threaded grooves matched with the positioning bolts are formed in the left side and the right side of the shell correspondingly, a rectangular hole is formed in the front face of the rectangular frame, and a positioning block is slidably connected to the inner wall of the rectangular hole. According to the computer screen device with the dust removal function, a protection screen can be inserted into a rectangular hole through a positioning block, meanwhile, the protection screen can be inserted into an annular groove and extrudes a rubber sealing ring, the protection screen can press and sea