Physiologically based pharmacokinetics (PBPK) model is a tool to simulate the process of drug absorption, distribution, metabolism and excretion in vivo. It is widely used in drug research and regulation. In the bioequivalence evaluation of generic drug consistency evaluation and drug production process change,the PBPK model can provide a certain reference and theoretical support for the drug bioequivalence, thereby promoting safer and more economic drug clinical trials. In this paper, the application progress of PBPK model in bioequivalence study will be reviewed in order to provide support for clinical research on drugs in China.