The invention discloses a method for adjusting the remaining drying time of a clothes dryer. The clothes dryer is provided with a humidity detection device, a timing device and a time display device. The clothes dryer is provided with a default initial clothes drying time length. The clothes drying process includes a hot air clothes drying stage and a cold air temperature reduction stage, the initial clothes drying time length is reduced gradually in a countdown mode during drying, the humidity detection device detects the humidify value of a load in the hot air clothes drying stage, and when the detected humidity value reaches a set humidity threshold value, the current remaining time is adjusted to be a preset remaining time length corresponding to the remaining time displayed currently. According to the method, remaining drying time is adjusted by comparing the detected humidity value of the load with the preset humidity value, the judgment method is simple, and calculation is accurate.