The invention discloses a clothes 
drying machine and a washing control method thereof. The clothes 
drying machine comprises a roller, a condensation device, an 
evaporator, a water receiving container, a 
water storage container, a cleaning device and a control device, the condensation device through an air 
inlet channel is connected with an air inlet of the roller; the import end of the 
evaporator through an air 
return channel is connected with an air return inlet of the roller; the water receiving container is used for receiving the condensation water; a water detection device is arranged inside the 
water storage container; a cleaning inlet of the cleaning device is connected with the outlet of the 
water storage container, the cleaning outlet is suitable for spraying water to the 
evaporator, wherein the cleaning outlet comprises a first cleaning opening and a second cleaning opening, and the cleaning device is provided with a control valve; the control device is connected with a 
water level detector and the cleaning device so as to control the opening and closing of the first cleaning opening and the second cleaning opening through the 
water level detector. The 
drying machine can detect the level of water condensation, different parts of the evaporator can be cleaned according to the detection information, the cleaning effect can be improved, the 
dander on the evaporator is cleaned, and heat exchange performance and drying efficiency are increased.