The purpose of rural informationization is to provide effective information for farmers, increase production efficiency and income level of farmers in agricultural production. In recent years, under the guidance of No. 1 document of central government, China’s rural informationization has obtained considerable development. However, due to influence of terrain, mountain areas are still backward in informationization development. Combining actual conditions of Pingshan County of Hebei Province, the authors visited local farmers and made detailed survey on basic conditions of farmers, and analyzed factors obstructing agricultural informationization development in mountain areas, to provide theoretical reference for promoting informationization development in mountain areas and increasing income of local farmers.