The present disclosure relates to an electronic atomization device and an atomizer thereof. The atomizer includes a housing and an inhalation mouthpiece sleeved on an upper portion of the housing. A first air inlet channel communicating with the outside is provided between the inhalation mouthpiece and the housing. The housing is provided with a second air inlet port communicating with the first air inlet channel. The first air inlet channel is provided with a liquid absorption structure, which includes a plurality of first liquid absorption microgrooves provided on the outer sidewall portion of the housing that is located within the first air inlet channel. By providing the plurality of first liquid absorption microgrooves, most of the condensate can be absorbed by capillary tension and thus will not flow to the outside of the housing and the atomizer, thereby improving user experience and aesthetic appearance effect of the atomizer.