Slurry filling pump with flow rate control function

Disclosed is a slurry filling pump with a flow rate control function. A main pump core is a spiral body with a varying pitch, a varying root diameter and an equal outer diameter and comprises three or a plurality of different spiral impellers (21) which are mounted on a transmission shaft (22) and are sleeved in a cylinder space (pump shell) formed by an upper pump body (19) and a lower pump body (24), a feed port (26) is arranged at one end of the upper pump body, a discharge port (27) is arranged at the other end of the lower pump body, the inner wall of the pump shell is closely matched with the periphery of the pump core to form a sealed wedge-shaped spiral space, and the wedge-shaped spiral space is naturally communicated with the feed port (26) and the discharge port (27). When the transmission shaft (22) is driven to continuously run forwards, the wedge-shaped spiral space can continuously reduce and generate positive pressure, media entering the spiral space are dragged, pushed and conveyed under the