In order to study the explosive separation of woven board made of carbon fiber reinforced composite,a new idea of embedding a detonating cord in a groove on both sides of the composite board was adopted.By combining numerical simulation with experiments,the separation of composite board with no confining medium added,copper shell constraint added and lead shell constraint added at the groove opening was compared and analyzed.According to the Tsai-Wu tensor strength criterion,the damage degree of composite board under three constraint conditions was judged respectively,and the pressure and velocity of the surface element of composite board under each condition were further discussed.The results show that the composite board without dielectric covering groove is successfully separated by covering metal shell at the opening of groove on both sides.The metal shell can prolong the duration of high pressure of detonation products and improve the dispersion speed of surface element particles,and the constraint effect of lead shell on explosion energy is better than that of copper shell.The total explosion energy of composite plate restrained by lead shell is 1.06 times that of copper shell and 1.5 times that of the composite plate without shell.In a certain range,the research results can provide a new technical solution for spacecraft interstage separation.