Objective To analyze and explore the three-child fertility intention of residents and its influencing factors in Guangxi.Methods A convenience sampling method was used to select residents aged 18 and above who were living in Guangxi as survey respondents.A questionnaire was administered to understand their attitudes,intentions,and the influencing factors related to the third-child policy.Results Among the 514 respondents,308 supported the third-child policy,accounting for 59.9%.Respondents over the age of 40(OR=4.236,P=0.005),those who believed the third-child policy had a positive impact on China's population(OR=4.065,P<0.001),and those who thought the policy had minimal impact on women's job-seeking difficulties(OR=3.066,P=0.002)were more likely to support the third-child policy.High child-rearing costs(96.1%),increased impact on women's life plans(82.5%),and limited educational resources(79.1%)were the main factors affecting their willingness to have a third child.Conclusion Currently,the desire of Guangxi residents to have a third child is not strong.Future efforts should focus on the fertility needs and intentions of families and individuals of childbearing age,adopting multiple measures to effectively build a social support system for having a third child,and promoting the healthy development of China's population structure.