Clothes dryer and control method thereof

The clothes dryer comprises a roller, a weight detection sensor, a moisture content detection circuit and a control unit. The control unit is configured to: based on the weight of the object to be dried detected by the weight detection sensor and residual moisture content information on the object to be dried obtained by the moisture content detection sensor when a first predetermined time elapses after an initial drying period is started according to an initial control condition; determining a category of the object to be dried among the plurality of categories; monitoring a reduction state of residual moisture content information of the object to be dried obtained by the moisture content detection circuit based on a reference time and a moisture content threshold defined corresponding to the determined category to determine a degree of drying of the object to be dried; and starting a main drying cycle according to a control condition determined corresponding to the determined degree of drying. 干衣机包括滚筒、重量检测传