International Conference on Computational Science and Numerical Algorithms (CSMA 2020) will be held from May 29-31, 2020 in Xiamen, China. CSMA 2020 will cover issues on Applications of computational science,Problem solving environments, Complex systems: modeling and simulation, Web and grid based simulation and computing, Linear and nonlinear programming, Advanced computing architectures and new programming models, Computational humanities, etc. It dedicates to creating a stage for exchanging the latest research results and sharing the advanced research methods.