Abstract: The fragmentation and penetration of materials having different mechanical characteristics are studied for the development of tungsten heavy alloy fragile projectile. An FEM analysis model for tungsten heavy alloy fragile projectile is established. Simulation of the process of penetration of tungsten heavy alloy with different ratios of tension to compression against the target was carried out with the dynamic nonlinear finite element analysis software MSC-Dytran. Rules of fragmentation and penetration of tungsten heavy alloy are obtained. Analysis of simulation results shows that the power of fragmentation of projectiles increases as tension intensity falls, but the power of penetration increases as tension intensity increases. Numerical simulation and analysis of results offer a theoretical reference for the engineering design of tungsten heavy alloy fragile projectiles.