Abstract: A study has been undertaken to explore the dynamics of soil chemical properties under different water-logging durations following re-vegetation in the urban hydro-fluctuation belt of the Three Gorges Reservoir Region. The study also aimed to determine the potential impact of vegetation reconstruction on water quality. Soil samples were taken from Hemarthria compressa, Cynodon dactylon and Saccharum spontaneum communities, and from non-vegetated areas in a hydro-fluctuation belt located in downtown Chongqing, in June 2012, March 2013, May 2013, July 2013 and September 2013. Analysis was undertaken of soil pH, organic matter (OM), alkali hydrolysable nitrogen (AN), available phosphorus (AP), available potassium (AK), total nitrogen (TN), total phosphorus (TP) and total potassium (TK). Results showed that vegetation type significantly influenced soil pH values and AN, AP and TP contents. No significant differences were found in the tested properties between soils without vegetation and those beneath the three types of artificial grasses. However, there were significant soil differences under different water-logging durations. pH values and OM contents fluctuated throughout the experiment. Soil pH ranged from 6.5 to 8.5. AN contents were relatively higher in March and September 2013, when the water level dropped, while maximum AP contents were found in June 2012. At that time, AP contents under bare areas, H. compressa, C. dactylon, and S. spontaneum were (2.62±0.30), (3.92±0.34), (1.08±0.16), and (1.24±0.06) mg/kg respectively. TP and TK contents increased in the later phases of the experiment. The study also showed that, besides vegetation and hydrological factors, other factors such as urban sewage discharge, human disturbance and point or non-point source pollution caused by surface runoff influenced soil pH and nutrients. For the Yangtze River in Chongqing urban areas of the Three Gorges Reservoir Region, the potential risk of water eutrophication caused by artificial grasses might be lower.