The utility model relates to a bag type respirator for the prevention of a respiratory infectious disease, which belongs to a prevention and health product and is developed for the prevention of the spread and the fulminating prevalence of a respiratory infectious disease in places with dense people, such as schools, hospitals, and the like. The bag type respirator comprises a respirator bag (1), a medicine gauze (2), a respirator body (3) and four respirator belts (4) and is characterized in that one side of the respirator body (3) is provided with the respirator bag (1), the medicine gauze (2) is placed into the respirator bag (1), and four corners of the respirator body (3) are sewed with the respirator belts (4). The gauze is soaked by liquid medicine decocted by radix isatidis magistral medicines and dried with low temperature so as to form the medicine gauze which is placed into the respirator bag, and the medicine gauze is just in the front part of the nostrils and the mouth when the respirator is used. The respirator has the function of the prevention, the restriction and the elimination of pathogenic microorganism exhaled by patients, thereby avoiding and reducing air pollution and environment pollution which are caused by the pathogenic microorganism. In addition, with the volatilization of effective ingredients of medicine and the absorption of the medicine by nose and oral mucous membrane, the respirator has the function of the prevention and the treatment of a respiratory infectious disease.