The mechanism of action of β-lactam antibiotics is to inhibit cell wall mucopeptide synthetase, thereby causing the bacterial cell wall to be defective and the bacterium to expand and lyse. At the same time trigger the bacterial autolytic enzyme activity so as to arrive at the inhibition of bacterial effect, including: penicillin and its derivatives, cephalosporins, monoamide cyclic, carbapenems and penicillin-like enzyme inhibitors, and so on. Specific drug names are as follows: penicillin sodium, procaine penicillin, penicillin V potassium, methicillin sodium, cloxacillin sodium, amoxicillin sodium, piperacillin sodium, alloxacillin sodium, cefradine, cefuroxime sodium, cefotaxime sodium, cefoperazone sodium, amitriptyline, meropenem and other drugs. These drugs are a class of antibiotics with a wide antibacterial spectrum, with strong bacterial activity, low toxicity, wide range of indications and good clinical efficacy, etc., and are widely used in clinical practice.