The invention provides a sludge drying device and method. The sludge drying device comprises a cavity, a heat source supply device and a vibration device, wherein a feeding hole and a discharging holeare respectively formed in two ends of the cavity, sludge enters the cavity from the feeding hole and is discharged from the discharging hole; the heat source supply device is used for supplying a heat source and exchanging heat with sludge in the cavity so as to dry the sludge; and the vibration device is used for vibrating the sludge in the sludge drying process. According to the sludge dryingdevice and the sludge drying method, when the heat source exchanges heat with the sludge so as to dry the sludge, the sludge is vibrated and processed by virtue of the vibration device and is vibratedto overturn while being dried so as to form different surfaces exchanging heat with the heat source, so that the heat exchange between the heat source and the sludge is enhanced, the drying efficiency is improved, the drying time is shortened, and the energy consumption is reduced.