Abstract: In order to clarify the relationship of the educational level of farmers and their family income， the random survey was used to analyze the survey results from 13 cities and counties in Gansu province. Furthermore， the effect of educational level of farmers on their family income was investigated by using Mincer model with logarithmic model. The results showed that there was a positive relationship between the educational level and family income， but the correlation coefficient was not very high， which was mainly due to the regional differences. When the educational level reached junior high school degree， the family income will be significantly improved， and the higher the educational level the more obvious increase of the family income. The wages income of rural households reached the peak when the education years were 16.46 years．

Key words: Gansu, rural labor force, educational level, family income, Mincer model