Sludge crushing and drying device

The utility model discloses a sludge crushing and drying device which comprises a machine base, a drying rotary drum is arranged on the machine base, a material inlet is formed in one end of the drying rotary drum, a hot smoke inlet is formed above the material inlet, an inner rotating shaft is arranged in the drying rotary drum, a stirring pushing rod is arranged on the inner rotating shaft in the radial direction, and a hot smoke outlet is formed in the other end of the drying rotary drum. The stirring pushing rod sequentially comprises a connecting part and a crushing part in the length direction, the connecting part is connected with the inner rotating shaft, and the cross section of the crushing part is semicircular. The stirring pushing rod is divided into the connecting part and the crushing part, the crushing part of a semicircular structure is utilized to ensure that materials move towards the outlet direction as much as possible, the probability that the materials splash towards the inlet direction