The invention relates to a control method of a clothes dryer and the clothes dryer. When the temperature in a drum reaches a high temperature alarm value or a fire occurs to the drum, a computer boardcontrols a valve body to open according to the temperature control judgment of a temperature controller connected to the computer board or sensors disposed in the drum directly control the opening ofthe valve body to enable a nozzle to spray water into the drum. Firstly, the valve body can be started when clothes in the drum are about to reach an ignition point to enable the nozzle to spray thewater into the drum to cool down, so that the fire is prevented from happening; the valve body can be started after the clothes in the drum are fired to enable the nozzle to spray the water into the drum to put out the fire, and timely remediation is achieved to minimize losses; secondly, the computer board can control the opening of the valve body according to the temperature control judgment ofthe temperature controller, the sensors in the drum can further control the opening of the valve body, the one, having the priority of detecting the high temperature alarm value in the drum, of the computer board and the sensors controls the valve body to enable the control more timely, and in the event of one of the computer board and the sensors fails, the other one can still ensure normal operation of the clothes dryer.