Abstract: To reveal the differences in soil nutrients and ecological stoichiometric characteristics among three mangrove communities in the Quanzhou Bay estuary wetland, the Aegiceras corniculatum community, Kandelia obovata community, and K. obovata + A. corniculatum mixed community were selected as research subjects. The main soil nutrient indices, carbon storage, and stoichiometric ratios at 0-20 cm depth were measured. One-way ANOVA was used to examine the differences in soil nutrient indices, carbon storage, and stoichiometric characteristics under different mangrove restoration types, and the Nemerow index method was employed to comprehensively evaluate soil fertility for each community type. The results showed that, among the three typical mangroves of same age, the soil nutrient content of the K. obovata + A. corniculatum mixed community was significantly higher than that of the A. corniculatum community and the K. obovata community (p<0.05), while the soil nutrient content of the A. corniculatum community was slightly higher than that of the K. obovata community. For soil carbon storage, there was no significant difference between the A. corniculatum community and the K. obovata community, but significant differences were found among the A. corniculatum community, K. obovata community, and K. obovata + A. corniculatum mixed community, and the soil carbon storage of the mixed forest was significantly greater than that of both the A. corniculatum and K. obovata communities. The C:P and N:P ratios of the three typical mangrove soils showed significant differences (p<0.05), with C:P ratios ranging from 14.58 to 34.18 and N:P ratios ranging from 1.51 to 2.65; both indices ranked from high to low as follows: K. obovata + A. corniculatum mixed community, A. corniculatum community, and K. obovata community. The fertility coefficient of total nitrogen differed markedly among the three communities (the mixed community was the highest at 2.94, the K. obovata community was the lowest at 1.93, and the A. corniculatum community was in the middle at 2.44), whereas the fertility coefficients of other soil indices (organic matter, total phosphorus, total potassium, available phosphorus, and available potassium) showed no significant differences among the three communities. In the Quanzhou Bay estuary wetland, the differences in soil nutrients, ecological stoichiometric characteristics, and soil carbon storage among the three typical mangroves reflected the superiority of the mixed community model. The K. obovata + A. corniculatum mixed community achieved synergistic enhancement of carbon sink function and nutrient accumulation through regulating elemental balance. Compared with the pure forest restoration models of A. corniculatum and K. obovata, the K. obovata + A. corniculatum mixed mangrove restoration model can be prioritized for wetland restoration in this region.