Wetland degradation in the Yellow River delta region occurs due to petroleum development,increasing human activities,and environmental changes. In order to understand the wetland degradation processes，sampling and survey on plant community were conducted by selecting the typical wetland plots. Meanw bile,soil features including organic matter,nutrient s,and physiological characters,as well as some soil enzyme activities were analyzed. Results showed that the plant succession was form Imperata cylindrica,to Suaeda glauca,to Tamardx chdnensds,to barren land. Consequently,soil organic matter content was decreased by 81.0%,67.4%,and 59. 5%,respectively,when form Imperatacyldndrdca was compared with the other 3 forms. For total N,the percentages were 61.1%,59. 6%,and 41.2%and for effective P,19.5%,7.9%,and 4.7%,respectively. The soil enzyme activities such as urease and invertase fell as well,while soil salinity rose during vegetation succession. It is concluded that plant community succession interacts with soil property change. Soil salinization speeds up flora succession reversely,while plant community suc-cession in adverse environment also has a certain effect on soil features. In the process,soil moisture and sa-unity movement are the key factors.