Abstract: Abstract: In order to quickly and accurately grasp the spatial distribution and effectively promote the security protection of small-scale cultivated land resources, the paper took Changli County, Hebei Province as the research object, used documentary research method to perfect the connotation of cultivated land resource security and constructed evaluation framework suitable for cultivated land resources at county level. Taking the agricultural land classification results in Changli County in 2015 as the data base, and combined with the data of land use survey, agricultural geological survey, and soil sampling and detection information in the same period, the database of cultivated land security was built; and the single index evaluation method was used to evaluate the elements which affected the safety of cultivated land resources. The evaluation results showed that there were nearly 15% of the cultivated land in low yield level, nearly 10% of the cultivated land in bad condition of irrigation, nearly 15% of the cultivated land below the critical safety level of soil profile pattern, and nearly 10% of the cultivated land in low level of available phosphorus. In addition, soil organic content in the whole county was under the safety grade, and the content of copper in the regions with very small area was at low-level insecurity. Fertilizer use quantity in most regions was at low-level insecurity. Aiming at the unsafe danger of cultivated land resources in Changli County and with the uniformity principle in engineering technology and monitoring management measures, the paper overlapped the evaluation results which showed insecurity problems, lined out comprehensive engineering renovation zone, fertility promotion zone and abandoned farmland zone, and put forward the corresponding regulation and monitoring management system. The research showed that using the result of farmland classification can build database of cultivated land security quickly, also can promote the normalization of the monitoring work of cultivated land resources safety and implement safety diagnosis and evaluation regularly. All of these can efficiently implement full elements supervision and protection of cultivated land resources.