A composite nanometer piezoelectric generator based on an organic piezoelectric material and piezoelectric ceramic particles belongs to the field of nanometer generator preparation. The invention aims to provide and build up a nanometer generator film preparation method with the characteristics of quick preparation, uniform particles, low cost and high output and is characterized in that nanometer (or submicron) piezoelectric particles with high voltage coefficients are good in piezoelectric performance, the organic piezoelectric material as the base body is good in piezoelectric performance and the piezoelectric particles can also be uniformly dispersed in the organic piezoelectric material due to the good viscosity of the solution of the organic piezoelectric material, meanwhile, the piezoelectric particles are also good in mechanical performance; through the combination of the piezoelectric performance and the mechanical performance of the nanometer piezoelectric particles, flexible piezoelectric films with uniformly distributed particles can be prepared and the high output nanometer piezoelectric generator can be made through the high voltage polarization of the films. According to the invention, the characteristics of simple structure, low cost, quick preparation, good flexibility and high output and can be realized, and the composite nanometer piezoelectric generator can be applied to nanometer electricity generation field, force transducers and electric transducers and to drive LED and the like, as a result, the nanometer generator is excellent in application value.