In China, a pilot project for the prevention of mother-to-child transmission (PMTCT) of the HIV was initiated in 2001. For the PMTCT of HIV, the Chinese government has released versions of the guidelines since 2004. In 2014, the World Health Organization released guidance on global processes and criteria for the validation of elimination of mother-to-child transmission of HIV and syphilis. To promote the elimination of mother-to-child transmission of HIV, syphilis, and hepatitis B virus in China, the Chinese government updated the Guideline for PMTCT of HIV, Syphilis, and Hepatitis B in 2020 (briefly as Guideline-2020). The Guideline-2020 comprises 5 parts: goals, interventions, support measures, duties and cooperation of departments, and definition indicators for PMTCT of HIV and corresponding calculation formulas. Compared with the previous versions, the key points updated in the Guideline-2020 are that the goals are set again, and health education and promotion, the procedure of HIV testing for pregnant women, and the antiretroviral therapy regimen for HIV-positive pregnant women and antiretroviral) prophylaxis regimen for infants are all updated. The antiretroviral prophylaxis regimen as zidovudine-lamivudine-nevirapine/lopinavir/ritonavir twice per day for 6 weeks is recommended for infants at high exposure risk to HIV, whereas the third antiretroviral therapy regimen as tenofovir-lamivudine-lopinavir/ritonavir is recommended for HIV-positive pregnant women, and indicators for PMTCT of HIV and corresponding calculation formulas are defined.