The utility model relates to a chemical fertilizer production facility, a production of microorganism bacterial manure is with low temperature drying machine specifically says so. Including cylinder, orbital ring, the ring gear of fixed mounting on the cylinder outer wall, the ring gear passes through drive gear to be connected with the driving motor transmission, and orbital ring rolling mounting is on the bearing roller, and the low side of cylinder is provided with out the feed bin, and the upper end that goes out the feed bin is provided with the ventilation hole, the lower extreme is provided with discharging pipe, lateral wall butt joint cylinder, at the high -end support that is provided with of cylinder, fixed mounting has feed hopper on the support. It has a hot air chamber to go out in the inner chamber of feed bin fixed mounting, and hot air chamber's rear end butt joint is hot -blast to have the many hot -blast spray tubes that extend to in the cylinder inner chamber to interface, front end cartridge. The utility model discloses utilize hot air chamber and hot -blast spray tube with steam evenly distributed in the inner chamber of cylinder, hot -blast spray tube spun steam guidance quality is strong, the thermal efficiency is high, the stoving is effectual.