Biolog method was used to reveal the distinction of carbon source metabolic activities in Yellow River Delta. The samples indicated three succession phases of salt vegetation types, which included "bare board-severe salt tolerant communities (Saline Seepweed, Angiospermae)-mild salt communities (Imperata and A. Venetum.)". The results showed that the soil quality and the carbon source metabolic activities of soil microbial had the trend of significant and continuous improvement along with the succession of salt vegetation types (P<0.05), and the carbon source metabolic activities of soil microbial had the trend of extremely significant enhance (P<0.01). Shannon-wiener index, Richness index, Simpson index and Pielou evenness index were increased with the succession of salt vegetation types and had the significant correlation with total nitrogen, available nitrogen and conductivity (P<0.05). While those indexes had a significant negative correlation with soil salinity (P<0.01). Along with the succession of salt vegetation in the Yellow River Delta, the types and amounts of utilized carbon source were increased. Total nitrogen and available nitrogen were the crucial factors which significantly stimulated carbon metabolic abilities. While, soil salinity was the negative control factor.