In order to improve the efficiency and precision of land survey, this paper proposes a land survey method based on aerial photography of UAV. This paper introduces the application and implementation of UAV aerial photography in land survey, including original image acquisition, reference coordinate transformation, data processing and DLG production, and verifies the error of the results. The results show that this method can meet the precision of land survey, greatly improve the measurement efficiency, and provide effective technical support for land survey.