Screening device for material metallographic detection

The invention discloses a screening device for material metallographic detection, and mainly relates to the field of material screening. Comprising a screening mechanism arranged in a shell, a cover plate is installed at the top of the shell, a feeding port is formed in the cover plate, a qualified product discharging port is formed in the bottom of the shell, one side of the screening mechanism is rotationally connected with the inner side wall of the shell, a sliding block is slidably connected to the cover plate in the transverse direction, a lifting rod is arranged on the sliding block, and a lifting rod is arranged on the lifting rod. The lifting rod is slidably connected with the cover plate in the vertical direction, the end of the lifting rod is rotationally connected with a tray device, the tray device is in sliding contact with the bottom of the screening mechanism, and a driving mechanism for driving the sliding block to slide in the transverse direction and the lifting rod to slide in the vertical