Objective To translate the Barriers to Physical Activity during Pregnancy Scale (BPAPS) into Chinese, and to test the reliability and validity of the Chinese version. Methods The original scale was translated, back-translated, culturally adapted using the Brislin translation model to form the Chinese version of the scale. A convenience sampling method was used to survey 418 pregnant women in a tertiary maternity hospital in Nanjing from June to August 2023, in order to evaluate the reliability and validity of the Chinese version. Results The Chinese version BPAPS included 4 dimensions of pregnancy-related intrapersonal barriers, non-pregnancy related intrapersonal barriers, interpersonal barriers, and environmental barrier, totalling 29 items. The item-level content validity index (CVI) ranged from 0.833 to 1.000, and the scale-level CVI was 0.931. Exploratory factor analysis extracted 4 common factors with a cumulative variance contribution rate of 68.383%. Confirmatory factor analysis showed that the model fitted well (χ2/df=2.859,RMSEA=0.067,RMR=0.048,NFI=0.904,GFI=0.848,IFI=0.935,TLI=0.928,CFI=0.935). The Cronbach′s α coefficient of the scale was 0.947, and the test-retest reliability coefficient was 0.768. Conclusion The scale has good reliability and validity, and it can be used as an effective tool to assess barriers to physical activity during pregnancy.