The construction of well-facilitated farmland plays a vital role in ensuring national food security. Therefore, our study sought to facilitate the evaluation of farmland constructions and site selection. To achieve this, we conducted a case study in the Fengxiang District of Baoji City and developed a suitability evaluation model based on the ecological niche theory. This model considered four key factors: soil conditions, infrastructure construction, landscape patterns, and ecological constraints. Through a comparison of realistic and ideal ecological niches for various factors, we established a diagnostic model that identifies obstacle factors along with their respective obstacle degrees and ecological niches. By combining suitability, obstacle level, and transformation difficulty, we categorized different well-facilitated farmland construction priority zones, ranging from the most suitable and easiest to implement to the least suitable and more challenging. A total of 20,669 farmland patches were quantitatively evaluated and our findings indicated that the overall suitability of farmland construction in Fengxiang District is good. Cultivated land in the priority construction areas accounts for 47.49%, demonstrating high suitability for construction and the potential to reach optimal regional levels with minor adjustments. Our analysis revealed that the main obstacle factors in the landscape pattern dimension were mainly at the field scale, whereas the key obstacle factors in the ecological constraints dimension were related to irrigation water sources and slope gradients. Importantly, the evaluation results were generally consistent with the real situation, thus validating the scientific robustness and realistic nature of the ecological niche model for assessing construction suitability. Overall, our proposed approach can be used to effectively evaluate the suitability of regional well-facilitated farmland construction. These findings can serve as a solid basis for making scientifically informed decisions when selecting sites for well-facilitated farmland construction, contributing to its successful, efficient, and cost-effective implementation.