Abstract: With the support of EVNI4.8,SPSS17.0 and ARCGIS10.0 software platform,it analyzes the correlation between mangrove wetland landscape pattern and water quality in coastal waters by using the bivariate correlation analysis,by which chooses the offshore waters in Guangxi Beihai region as the study area based on the high multispectral data of SPOT5 satellite in 2010.The results show that the mangrove wetland landscape pattern has a certain representation of water quality in coastal waters.The landscape area,fragmentation,diversity and dominant species are the main indicators affecting the quality of water environment.There is a certain correlation between landscape pattern index and water quality parameters which is a significant positive correlation between TLA and transparency,a significant positive correlation between NumP and salinity,a significant negative correlation between NumP and chemical oxygen demand(BOD),a significant negative correlation between MPFD and ammonium salt(NH4+),a significant negative correlation among MPAR,nitrite(NO2-),nitrate(NO3-) and inorganic phosphorus(P) and a significant positive correlation between SDI and mercury(Hg).The correlation is not obvious between other landscape pattern index and water quality parameters.