A folding travel humidifier, comprising a humidifier main body and a water storage bag arranged on an upper part of the main body of the humidifier; the main body of the humidifier is provided with a power source, a control circuit board and the utility model An atomizer for generating a water mist during vibration; the atomizer is electrically connected to the control circuit board; the water storage bag includes a wave body disposed around the outer circumference of the humidifier main body, and can be folded and stored toward the bottom, and The inner side of the wave crest body is provided with a vent hole for outputting a water mist; the atomizer is located at an intermediate portion of the bottom of the water storage bag.