A medical atomizer for atomization inhalation therapy, comprising a drug storage device, an atomized drug collecting tank and an atomization generating assembly, an accommodation chamber is formed between the lower part of the drug storage device and the atomized drug collecting tank, the accommodation chamber is used for accommodating the atomization generating assembly; wherein the atomization generating assembly comprises a sealing sleeve and an atomizing sheet; the sealing sleeve has a sidewall, a first panel and a second panel, the first panel and the second panel are arranged oppositely, the sidewall is arranged to connect the first panel and the second panel into an integral structure, the sidewall, the first panel and the second panel are jointly enclosed, forming an atomizing sheet chamber which is used to accommodate the atomizing sheet; the atomizing sheet is located between the first panel and the second panel, and it does not exceed the area defined by the sidewall; the middle part of the first panel is provided with a first opening, the middle part of the second panel is provided with a second opening; the first opening and the second opening are used cooperatively so as to make at least a part of the atomizing sheet exposed outside the atomizing sheet chamber; wherein a first sealing ring is arranged on the inner side of the first opening, and a second sealing ring is arranged on the inner side of the second opening; the first sealing ring and the second sealing ring are matched for fixing the atomizing sheet in the atomizing sheet chamber; wherein the first panel, the second panel, the first sealing ring and the second sealing ring are formed into integral structure; characterized in that the sidewall is provided with an opening for installing the atomizing sheet into the atomizing sheet chamber, the first panel and/or the second panel are provided with a notch which is located at the opening on the sidewall, and the shape of the atomized drug collection tank is spindle. wherein the atomization generating assembly comprises a sealing sleeve and an atomizing sheet; the sealing sleeve has a sidewall, a first panel and a second panel, the first panel and the second panel are arranged oppositely, the sidewall is arranged to connect the first panel and the second panel into an integral structure, the sidewall, the first panel and the second panel are jointly enclosed, forming an atomizing sheet chamber which is used to accommodate the atomizing sheet; the atomizing sheet is located between the first panel and the second panel, and it does not exceed the area defined by the sidewall; the middle part of the first panel is provided with a first opening, the middle part of the second panel is provided with a second opening; the first opening and the second opening are used cooperatively so as to make at least a part of the atomizing sheet exposed outside the atomizing sheet chamber; wherein a first sealing ring is arranged on the inner side of the first opening, and a second sealing ring is arranged on the inner side of the second opening; the first sealing ring and the second sealing ring are matched for fixing the atomizing sheet in the atomizing sheet chamber; wherein the first panel, the second panel, the first sealing ring and the second sealing ring are formed into integral structure; characterized in that the sidewall is provided with an opening for installing the atomizing sheet into the atomizing sheet chamber, the first panel and/or the second panel are provided with a notch which is located at the opening on the sidewall, and the shape of the atomized drug collection tank is spindle.