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This invention relates to drug nebulizers, specifically disclosing a wearable respiratory medicine drug nebulizer, comprising a housing and a handle fixedly connected to its lower end. The housing has an internal air collecting tube and an external exhaust port extending into the air collecting tube, with a breathing mask connected to the exhaust port. An elastic cord for wearing the breathing mask on the patient's face is connected to the housing, and a medicine bottle is mounted at the upper end of the housing. An air compressor is installed inside the housing. The air collecting tube is connected to the medicine bottle via an air delivery tube, and the middle part of the air delivery tube is connected to the exhaust end of the air compressor. This invention results in fewer droplets in the breathing mask during patient exhalation, reducing medication waste; and more droplets in the breathing mask during patient inhalation, facilitating the inhalation of more medication-containing droplets, thereby improving medication utilization.