Ecological resilience offers a novel framework for coastal ecosystems to address internal and external risk disturbances. Accurately identifying the spatiotemporal relationship between ecological resilience and land use intensity holds significance for promoting sustainable development in coastal zones. This study established an ecological resilience evaluation model integrating resistance, adaptability, and recovery, alongside a land use intensity model, to analyze the spatiotemporal evolution patterns of ecological resilience and land use intensity in Xieqian port from 2000 to 2022. Their spatiotemporal relationships were explored via bivariate spatial autocorrelation and coupling coordination models, with influencing factors of their coupling coordination further detected using geodetectors. The results indicated: (1) Ecological resilience exhibited a fluctuating downward trend from 2000 to 2022. Ecosystem resistance declined continuously in all years except 2005-2010, while ecosystem adaptability showed a slight fluctuating upward trend, and ecosystem recovery first increased then decreased; (2) Land use intensity in Xieqian port decreased initially before continuously increasing from 2000 to 2022, predominantly at low and medium intensity levels; (3) A significant negative correlation was observed between ecological resilience and land use intensity from 2000 to 2022, remaining in the primary coordination stage with a relatively high coupling coordination level; (4) Terrain and slope emerged as dominant factors influencing the coupling coordination of ecological resilience and land use intensity, with the influence magnitude of socioeconomic factors increasing rapidly. Interaction detection was predominantly characterized by the two-factor enhancement effect.