Abstract: Abstract: The construction of high standard basic farmland is an important strategic measure for ensuring food security in China. We took Changli County of Hebei Province as the research area. Based on the data of permanent basic farmland delineation, the arable land quality grade update, land use change, soil sampling and others, the permanent basic farmland map was taken as the evaluation unit, and the evaluation index system was constructed from seven aspects: soil quality, space quality, location conditions, infrastructure, economic level, ecological quality and environmental pollution. The improved catastrophe progression model was used to evaluate the construction suitability from four levels of natural quality, socio-economic, ecological environment and comprehensive conditions. On the basis of the comprehensive suitability scores, the hotspot analysis method was used to analyze the spatial clustering characteristics and then the high-standard basic farmland priority areas were delineated, in order to provide reference for the construction of high standard basic farmland and the implementation of related land remediation work in Changli County. We found that the spatial distribution characteristics of natural quality, socio-economic and ecological environment suitability were very different. The high-value zones of natural quality suitability were evenly distributed in each town, while the low-value zones were concentrated in the areas along the Qilihai River. The high-value zones of socio-economic suitability were concentrated in the downstream of the three major rivers, as well as along the national roads and major county roads, while the low-value zones were scattered in areas far away from the main trunk lines and rural settlements. The spatial distribution pattern of ecological environment suitability was relatively scattered, but the ecological environment suitability of the area near the eastern state-owned forest farms and the upstream of the southwestern rivers was higher than other regions. The comprehensive suitability was mainly suitable and the spatial differentiation was obvious. The comprehensive suitability score was divided into five levels including completely suitable, basically suitable, critically suitable, basically unsuitable, and completely unsuitable by the natural breakpoint method, and the area ratios of the five were 26.73%, 28.69%, 23.36%, 14.48% and 6.74%. In the space, the comprehensive suitability of the areas along the Luanhe River and the Yinma River, along national roads and county roads was strong, while it was poor of the sand belt in the Qilihai river basin and the southeastern Luanhe river estuary. The area ratios of the top priority zone, the secondary priority zone and the tertiary priority zone were 32.28%, 38.65% and 29.07% respectively. In the space, the top priority zone was highly coincident with the completely suitable level area, the secondary priority zone was highly coincident with the basic suitable level area, and the tertiary priority zone was basically located in the unsuitable level area. The evaluation method based on permanent basic farmland map and improved catastrophe progression model can be effectively used for high-standard basic farmland comprehensive quality and construction suitability evaluation. The research results can guide the selection of high standard basic farmland construction projects in Changli County.