Objective To optimize the culture medium for production of monoclonal antibody (McAb) against human epidermal growth factor receptor 2 (HER2) by using design of experiments (DOE) so as to increase the expression level of McAb.Methods The effects of various basal media and feeding media on cell d. and expression of McAb against HER2 in engineering cell were investigated by DOE with Minitab software.Results After optimization by DOE, the viable cell d. of recombinant cell strain reached 296 × 105 cells/mL at most.However, the expression level of antibody titer reached 2.07 g/L at most, which increased by 72% compared with that before optimization (1.20 g/L).The quality of antibody was similar to that of antibody developed previously as control.Conclusion An optimized combination of basal media and feeding media was obtained, by which the cell d. and antibody expression level increased.The optimized combination was suitable for production of McAb against HER2, indicating DOE as an effective method for rapidly increasing the expression level of antibody within a short time period.