Protective device convenient to disassemble and replace for office table production and processing

The utility model discloses a protective device convenient to disassemble and replace for office table production and processing, which belongs to the technical field of office table protection and comprises a ceramic table top plate, supporting frames are clamped at four corners of the ceramic table top plate, fixing rods are fixed on opposite sides of the adjacent supporting frames, and the ceramic table top plate is fixed on the ceramic table top plate. The fixed rods are inserted into the movable box, the fixed gears and the movable gears are meshed with the gears respectively, the fixed gears are meshed with the tooth grooves, movement of the two sets of fixed rods in the movable box can be limited, and when the pressing plate is pressed to enable the pressing plate to move into the movable box, the movable rods drive the fixed gears to be separated from the tooth grooves. At the moment, the fixed gear relieves limitation on the fixed rod, the fixed rod can freely move under the cooperation of the movabl