Based on comprehensive consideration of topography, geological structure, seismological features and historical records, the authors simulated an earthquake tsunami with the rebuilt program from Prof. Philip Liu based on Matlab and Windows OS. The authors used crossed grid leap-frog difference scheme to solve linear or non-linear water wave functions in spherical coordinate and rectangular coordinate system, and simulated scenario earthquake tsunami propagation in the coast area of East China, and evaluated the risk and hazards of the area. The results show that the coast of East China is lowly influenced by earthquake tsunami.