Considering the problems of little electrical energy output and short power-on time for impactive piezoelectric generator, a new generator for fuze based on cymbal piezoelectric array was designed. The power generation model was established by piezoelectric generator and vibration theory. The impact test device was set up to mimic ammunition launch environment and test the power generation capacity of the generator. The results indicate that this new generator could collect impact energy in the ammunition launch environment effectively and convert it to continuous electrical energy by mass-spring system and cymbal piezoelectric array. The output time can reach 2.499 s at a load of 209.05 g.