The utility model relates to an I-shaped atomizing humidifier, which is applied to industries, such as textile, tobacco printing, etc. The utility model is composed of a body, a nuts, an air cover, etc., wherein, the body is directly provided with an air inlet hole and a water inlet hole which are communicated with an air channel and a water channel. The inlet hole and the water inlet hole are opened, air with high pressure forms negative pressure at the spray nozzle of a spray head, which causes water to be sucked and to be impacted, forming a mist shape so as to achieve the purposes of atomization and moistening. The utility model has the advantages of simple structure and no need of adding facilities and the cost of processing is further decreased. The humidification performance of the utility model has the characteristics of large humidification quantity, low energy consumption, favorable effect on atomization, no special requirement to the water quality, etc.