The invention provides a large humidification amount humidifier. The large humidification amount humidifier comprises a machine case, and further comprises an atomization unit and an air supply unit which are arranged in the machine base, wherein the atomization unit comprises a water tank located in the middle of the machine case, a part, located above the water tank, of space in the machine case, is upper space, the other part, located below the water tank, of the space in the machine case, is lower space, a plurality of atomization sheets are arranged at the bottom of the water tank, the air supply unit comprises a draught fan, an air inlet and an air outlet, the draught fan is arranged in the upper space and above the water tank, the air inlet communicates with the lower space, the airoutlet communicates with the outer space, a ventilation opening is formed between the lower space and the upper space, and an air supply channel is formed from the air inlet to the ventilation opening until the air outlet. According to the large humidification amount humidifier, the atomization unit of the humidifier is arranged between the upper space and the lower space, comprises the pluralityof the atomization sheets, and realizes large humidification amount, the air supply unit is arranged in the humidifier meanwhile, and the air supply unit passes through space above the atomization unit, delivers atomization air into air, realizes good humidification effect, enables the surrounding air to perform humidification circulation, and is reasonable in structure and good in effect.