Health education is one of the most effective and efficient ways to achieve the goal of universal health coverage and the sustainable development goals. The equity of access to health services (especially services from community healthcare centers) for internal migrants is an important issue of global concern. However, due to the registration system, long-term residence plan, education level, and other determinants, it is more difficult for internal migrants to enjoy equitable health education compared with local residents. At present, there is no research on signing up with family doctors mainly from community healthcare centers among internal migrants and their impact on access to health education services. In this nationwide cross-sectional study, we used the migrant population dynamic monitoring survey (MDMS) in 2018 to assess the disparities in signing up with a family doctor and its association with health education among internal migrants in China. Among the 151,892 participants, a total of 11.26% migrants had signed up with a family doctor and 81.37% internal migrants had received health education. There was a significant association between signing up with a family doctor and health education in the univariate model (aOR = 1.113; 95% CI: 1.095, 1.132) and the multivariate model (aOR = 1.107, 95% CI: 1.089, 1.126). Meanwhile, age (aORinteraction = 0.996, 95% CI: 0.994, 0.997), migration time (aORinteraction = 0.927, 95% CI: 0.907, 0.948), and migration range (aORinteraction = 0.994, 95% CI: 0.992, 0.997) also had an impact on the relationship between signing up with family doctors and health education. Due to the health education inequalities among internal migrants in China, we need to improve health education access and utilization of internal migrants. As signed up with family doctors was significantly associated with health education among migrants in China, we recommended that the government and healthcare facilities promote health education through family doctors. The number and professional ability of family doctors should also be improved especially in areas with weak healthcare service resources in the future.