Based on the 2016 CFPS database, this article uses the OLS model to empirically test the impact of Internet use on personal income of residents, and further conducts heterogeneous expansion research to explore the impact of the Internet on the income of different groups and the mechanism of the Internet's impact on personal income. The results of the study show that Internet use has increased the income of residents by 20.2%. The impact of Internet use on rural residents and female residents is greater than that on urban residents and male residents respectively. Internet use has a more significant impact on residents with moderate education. Financial products may be the role of the Internet in affecting residents' income.