Abstract: Based on the high resolution re-analyzed wave data of ERA-interim,we calculate some wave energy parameters,such as wave power density,significant wave height,average period,and effective wave time. The dataset provided by the European Centre for Medium-Range Weather Forecasts（ECMWF）spends nearly 37 years（January 1997—December 2015）,and the resolution is 0.125°×0.125°. Our research indicates that the wave energy resources in the South China Sea show obvious seasonal distribution,which reach the peak in winter,and hit the bottom in summer. The area with the most abundant wave energy resources locates in a northeast-tosouthwest line that links Luzon Strait and the southeastward direction of Indo China Peninsula. The maximum zone is closed to the Luzon Strait. The wave energy flow density in this area is up to 16 kW/m. considering the wave power,effective wave time,the distance from the nearest port to the mainland and the area of islands,we recommend a site“A”as the best choice for future exploitations.