Discharging device in material cylinder

The invention discloses a discharging device in a material cylinder, which can uniformly discharge materials as required. The discharging device comprises a discharging plate mechanism, a central material cover, radial leakage-proof covers and a side plate, which are connected with the material cylinder respectively, wherein the discharging plate mechanism is mounted on a support member inside the material cylinder, covers a material channel of the material cylinder, and comprises an annular discharging plate and reciprocating drivers; the annular discharging plate is formed by splicing a plurality of sectorial moving plate units, and each moving plate unit is connected with the material cylinder through the corresponding reciprocating driver; the central material cover is tapered, and a through hole in the center of the annular discharging plate is covered with the central material cover; the side plate obliquely extends downwards towards the axis of the material cylinder from the wall of the material cylind