The utility model relates to an energy -saving sludge drying machine maximizes, including the casing of belt drive system's drum structure, its characterized in that: the one end of casing is equipped with the screw feeder, and its opposite side is equipped with out workbin, rotary joint respectively, and its inside equipartition has several rows of heat exchanger tube bundles, several rows of heat exchanger tube bundles intussuseptions are filled with the heat source, the bottom of casing is equipped with the bearing structure that two dot ORs are the inclination 3 o'clock. The utility model discloses simple structure, easy operation, heat exchange efficiency is high, and the loading and unloading capacity wide range is particularly useful for the production of maximizing, is applicable to the mummification of various mud such as industry mud and municipal sludge simultaneously.