Abstract: Suaeda salsa shows potential benefits for pollutant removal and ecological remediation, and it is an important species of gradation wetland in northern China. Before the landscape ecological restoration project of Suaeda salsa, the analysis of its growth habitat suitability will help to improve the survival rate of planting and achieve the expected ecological restoration effect. In this paper, GIS spatial analysis method and SPSS statistical method are used to analyze the spatial difference and statistical analysis of sediment quality factors and heavy metal pollution factors in the tidal flat of Caozhuang sea area, Xingcheng City, and the classification of habitat suitability is carried out based on this. The results showed that the area of moderate suitability was 194.6 ha, of which 170.9 ha was moderate suitability and 23.7 ha was high suitability. The results showed that the repair area and the growth status of Sueda Salsa had good coincidence degree with the habitat suitability analysis, and the vegetation community structure of each region was stable, the vegetation is growing well.