Provided is a humidifier, including a machine base, a water tank, a water suction pump, and a water inlet pipe. The machine base is located on the water tank, which includes an atomization water reservoir, a water feed base, a control base, an atomization air channel and an atomizer disposed inside. The water feed base includes a water feed opening and a first outflow opening, and the first outflow opening is in communication with the water tank; a water inlet is disposed on the atomization water reservoir, and water in the water tank will flow into the atomization water reservoir through the water inlet pipe by the water suction pump; the atomizer is in communication with the atomization water reservoir through an atomization opening disposed at the atomization water reservoir, and water vapor flows into the atomization air channel and flows to outside along the atomization air channel.