Gravel screening device

The invention relates to the field of gravel screening, in particular to a gravel screening device.The gravel screening device comprises a supporting base, a pressing mechanism, a clamping mechanism, a material guide box, a vibration base, a discharging guide frame and a pull-down transmission mechanism, when the gravel screening device is pushed through a screen plate, the screen plate pushes the pull-down transmission mechanism to move, the pull-down transmission mechanism downwards pulls an insertion column, and the insertion column is pushed to move; the clamping mechanism is arranged on the guide box, so that clamping of a sieve plate on the guide box is automatically opened, opening by workers is avoided, the workers only need to push the sieve plate, sliding of the sieve plate caused by opening the clamping mechanism in advance by the workers is avoided, the sieve plate can be replaced when equipment works, shutdown of a production line is avoided, and the production efficiency is improved. And the equ