The data of this paper comes from the field investigation in various parts of Liaoning Province. The multivariate linear regression model and the quantile regression model were used to investigate the influence of e-commerce behaviors on the per capita income gap. The paper also analyzed the marginal contribution of participating e-commerce firms to the income of farmers in different income groups. Through the comparison of differential coefficient,the paper drew the conclusion that participating in the electronic business is the influence on the income gap of farmers. The results showed that the rural income gap in Liaoning is still large,for the higher-income and high-income farmers,the e-commerce behaviors would narrow the income gap. The e-commerce companies would increase the income gap between the low-income and high-income farmers. Participating in e-commerce has a significant promoting effect on farmers’ income.