Abstract: Conducting suitability assessments for mudflat ecological restoration is crucial for enhancing the targeting, effectiveness, and sustainability of restoration efforts. Based on field survey data of the current suitable habitat for Suaeda salsa, an index system was developed incorporating five key factors: hydrological conditions (inundation duration), sedimentary conditions (total water-soluble salt content, organic carbon, grain size), native vegetation, biological invasion threat, and spatial utilization. The suitable range for each factor was determined, and a three-tiered classification method (Suitable, Basically Suitable, Unsuitable) was established. Integrating survey data on critical mudflat elements, the suitability for salt marsh vegetation restoration was evaluated in Jinghai Bay following the management of Spartina alterniflora. The results indicated that after Spartina alterniflora control, the sediment types in Jinghai Bay were predominantly silty sand or sandy silt, with an average inundation duration of 4.03 hours/day and a mean total water-soluble salt content of 8.05 g/kg. While these habitat conditions are conducive to Suaeda salsa growth, the overall suitability is categorized as "Basically Suitable" due to the potential impact of Spartina alterniflora regrowth. Therefore, prudence is required when implementing salt marsh vegetation restoration projects. Close monitoring of Spartina alterniflora regrowth during restoration, coupled with timely management, is essential to ensure restoration effectiveness and consolidate the ecological gains achieved post-Spartina alterniflora control.