From March 2013 to July 2014, 12 water quality parameters(including pH, DO, TP, PO43–-P, TN, NH4–-N, NO3–-N, Chl-a, etc) in Tianjin Aquatic Park Landscape Lake were investigated. The result indicates that eutrophication level of landscape lake was moderate-severe eutrophication and phosphorus was found to be the major restrictive factor. Principal component analysis showed that four latent variables occupied 69.95% to the cumulative contribution to variance, and F1 was the main contribution of the largest c...