The invention relates to a power positioning ship energy management optimized method. Scheduling is performed according to the energy consumption characteristics and output power ratios of generator sets; the combinations of the product of the ratio of the output power of each generator set to the maximum power of the generator set and the ratio of the rated power of each generator set to maximum generator set rated power are adopted as feasible solutions; each feasible solution is adopted as a particle, and the set of all the feasible solutions is adopted as a particle swarm; and an optimal feasible solution is obtained by particle swarm optimization, so that optimization can be realized. According to the power positioning ship energy management optimized method of the invention, the load of each ship generator set is reasonably allocated according to the particle swarm optimization and a constructed scheduling model, and therefore, the energy consumption of the ships can be reduced on the basis of ensuring the safety of the ships.