The inclined secondary-structure fine aggregate pump adopts a unique inclined body structure and is an upgraded unit dedicated to fine aggregate pouring. Compared with traditional horizontal pumps, it feeds more smoothly, is less prone to material accumulation and pipe blockage, and is fully suited to fine aggregate mortar pumping. The inclined body shortens the feeding stroke, giving faster feeding and uniform, stable output. It is specially adapted to pumping fine materials such as fine aggregate concrete, cement mortar and floor heating backfill slurry, effectively avoiding material stratification and segregation. The lightweight design makes it easy to move and carry, allowing free access to building floors, basements and confined construction areas. It is simple to operate, with low energy consumption and low noise, making it suitable for precise indoor work. It is mainly used for building secondary structural columns, ring beam pouring, floor heating backfill, roof leveling, indoor floor repair and wall plastering feeding, and is the preferred equipment for indoor fine aggregate pouring and small-scale supplementary material work.