▎ 摘　　要

NOVELTY - Method for preparing a flexible composite dielectric, involves (a) adding a matrix, a filler and a dielectric modifier into a beaker, (b) dripping N,N-dimethylformamide solution into a beaker, placing on a magnetic stirrer, sealing the beaker with plastic wrap and stirring to obtain a uniform mixed solution, (c) placing a polyethylene terephthalate substrate in a desktop homogenizer, dripping the mixed solution onto the polyethylene terephthalate substrate for reaction, and drying to obtain the product. USE - The method is used for preparing a flexible composite dielectric in application of energy storage (all claimed). ADVANTAGE - The method enables to prepare flexible composite dielectric that has high energy storage density and energy storage efficiency, and high breakdown field strength. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the flexible composite dielectric.