Using Tianjin as a case study, this study systematically evaluates the impact of the fragmentation of rural settlements on land-use efficiency and its gradient effects, from the dual perspectives of topographic and econo-mic gradients, based on approaches including landscape pattern indices and the geographically weighted regression model. The results show that: 1) Rural settlements in Tianjin are predominantly characterized by medium to high levels of fragmentation, displaying a concentric spatial pattern of gradual increase from the city center to the periphery, with relatively lower fragmentation in the Peri-urban Area and the Binhai New Area, and higher fragmentation in the Jizhou mountainous area and outer suburban area. Their land-use efficiency is mainly at medium to low levels, showing an opposite spatial pattern to fragmentation, declining gradually from the peri-urban area to the outer suburban area and the Jizhou mountainous area. 2) A significant correlation is observed between the fragmentation of rural settlements and land-use efficiency. Specifically, patch density, splitting index, and landscape shape index are negatively correlated with the land-use efficiency of rural settlements, whereas Mean Patch Area is positively correlated with it. 3) The impact of rural settlement fragmentation on land-use efficiency exhibits significant spatial non-stationarity. The effect is the strongest in areas with low topographic gradients, followed by areas with high topographic gradients, and relatively weaker in areas with moderate topographic gradients, while the impact intensity gradually decreases with increasing economic gradients. The research results can provide a theoretical basis for implementing rural settlement reconstruction and village planning. 

以天津市为例, 基于地形梯度和经济梯度双重视角, 运用景观格局指数法和地理加权回归模型等方法, 系统地评估农村居民点破碎化对土地利用效率的影响及梯度效应。结果表明, 天津市农村居民点形态以中、高破碎化为主, 呈现由市中心向外围逐步增高的圈层式空间分异格局, 环城区和滨海新区破碎化程度较低, 蓟州山区和远郊区较高; 农村居民点以中、低利用效率为主, 空间分布格局与破碎化相反, 从环城区向远郊区和蓟州山区逐步降低。农村居民点破碎化与土地利用效率存在显著的相关性, 农村居民点斑块密度、分裂指数和景观形状指数均与利用效率负相关, 而平均斑块面积与利用效率正相关。农村居民点破碎化对土地利用效率的影响存在显著的空间非平稳性。低地形梯度区影响强度最大, 高地形梯度区次之, 中地形梯度区影响强度相对较弱。经济梯度区影响强度则随经济梯度提升而逐步减弱。研究结果可为实施农村居民点重构及村庄规划等提供理论依据。