The embodiment of the invention provides a washing machine, and a ventilation control method and ventilation control device thereof, and belongs to the field of home appliances. The control method includes: receiving a washing command; performing a washing operation; and opening a ventilation mechanism before and/or after performing the washing operation so as to allow a washing roller of the washing machine to be in a ventilation state. According to the scheme, unwashed or washed clothes in the washing machine can be effectively ventilated, and the situation that the clothes are stored in a sealed environment of the washing machine for long time to cause bacteria and odors can be avoided.