The invention discloses a drying system for continuous circulated operation. The drying system comprises a drying unit, a feeding unit, a discharge unit, an air inlet unit and a lifting unit, wherein the drying unit comprises a shell with a heat-preservation layer outside, a plurality of discs which are matched with the inner side wall of the shell to accommodate a material to be dried, and a first conveying unit for displacing the discs of the material to be dried in a preset direction in a stepping manner so as to dry the material at preset time intervals; the lifting unit is arranged on the other side outside the shell and is communicated with the interior of the shell through a second conveying unit and a third conveying unit which are connected with one side of each of the bottom and the top of the shell respectively, thus achieving circulated conveying of empty discs. Due to cooperation of the units, a plurality of drying areas are formed by virtue of different temperatures and pressures inside the shell, and furthermore continuous utilization of heat is achieved, so that the drying system for continuous circulated operation, which is disclosed by the invention, has the effects of good implementation effect, high production efficiency, high heat utilization and high safety.