Pneumonia is divided into lobar pneumonia, lobular pneumonia and interstitial pneumonia according to anatomical classification. Ordinary pneumonia can be treated with oral antibiotics, mainly cephalosporin antibiotics. Small lobar pneumonia can be given cephalosporin I and II, including cefradine, cefadroxil, cefuroxime, cefprozil, etc. These antibiotics can effectively control the lung infection. In case of lobar pneumonia, cephalosporin III antibiotics including cefixime tablets can be given once in the morning and once in the evening, 100mg orally each time. If it is interstitial pneumonia, instead of giving cephalosporin, erythromycin class antibiotics need to be given to be effective. Therefore, what cephalosporin to eat for pneumonia is mainly based on the size of the pneumonia site and the bacteriological basis of the pneumonia, respectively, targeted selection of cephalosporin antibiotics, not just take cephalosporin antibiotics.