Laminated composite charge is composed of two or more different charges by way of superposition， in which the safety and power performance can be regulated through the design of charge structure. To study the sympathetic detonation safety of laminated composite charge， typical composite charges which contain both the high energy charge and insensitive charge were selected as research objects. The effect of different charges structure on critical sympathetic detonation distance was explored through numerical simulation and sympathetic detonation tests. Results showed that， compared to simple high energy charge， the sympathetic detonation of composite charge decreases 53.3%（from 7.5 mm decreases to 3.5 mm）， while energy decreases 22.9%. The thickness of insensitive charge must reach a certain threshold（3 mm） in order to reduce the critical sympathetic detonation distance obviously. As the content of insensitive charge increases， the critical sympathetic detonation distance is closer to insensitive charge.