Regarded as the launch object of EM (electromagnetic) energy weapon, the hypervelocity ILP (integrated launch projectile) has a lot of scientific problems different from those caused from traditional artillery. The theoretical and experimental results of EM launch ILP at home and aboard in recent years were summarized, and the basic theory and key technologies faced right now were analyzed. In addition, the solutions to these problems are put forward to provide some references to the subsequent research on EM launch ILP.