The invention relates to chemical
fertilizer production equipment, in particular to a drum-type granulating
machine for biological organic fertilizers. The
machine comprises a support, an upper drum which can be rotatably mounted at the upper end of the support and a driving motor, wherein an
orbital ring and a geared ring are fixedly mounted on the outer wall of the upper drum; the geared ring is in transmission connection with the driving motor by a driving gear; the
orbital ring is mounted on a carrier roller in a rolling manner; an inner chamber of the upper drum is of a conical structure of which the
diameter of the front end is small and the
diameter of the rear end is large; a transfer hopper is arranged at the rear end of the upper drum; a ventilation hole is formed in the upper end of the transfer hopper; a discharging
pipe is arranged at the lower end of the transfer hopper; the side wall of the transfer hopper is in
butt joint with the upper drum; a lower drum can be rotatably mounted under the support; an inner chamber of the lower drum is of a conical structure of which the
diameter of the front end is large and the diameter of the rear end is small; and the rear end of the lower drum is in
butt joint with the discharging
pipe. The reciprocating drum-type granulating
machine for the biological organic fertilizers has reasonable structure, is high in production efficiency, can complete processes such as membrane
coating, sieving and
drying can be completed once, and meanwhile, wall attachment materials can be removed without needing shutdown of the machine.