The secondary-structure concrete pump is special equipment customized for secondary construction work. It is mainly used for pouring secondary-structure concrete such as structural columns, ring beams, lintels and infill walls, and specifically solves the problems of manual pouring: low efficiency, poor compaction and incomplete filling. The machine is compact, light and highly maneuverable, and can easily enter and leave building floors, narrow corridors and confined construction spaces without site restrictions. It adopts a low-pressure fine aggregate pumping design suitable for fine aggregate concrete and mortar, delivering fine and uniform output, with dense pouring free of hollows, honeycombing and pitted surfaces, and a high rate of qualified construction quality. The equipment is simple to operate, with low energy consumption, low noise and high speed; compared with manual pouring, efficiency is improved several times over, greatly saving labor costs. It is widely used for secondary-structure pouring in buildings, indoor structural column construction, floor slab repair and small wall pouring, both indoors and outdoors.