The invention discloses a flexible actuator, comprising: a cover plate, which is a ring structure; a bottom plate, which is located below the cover plate, is a circular structure, has a blind hole inside, and an air-filling hole at the bottom of the blind hole; The dielectric elastomer is pre-stretched and tightly pressed between the lower end surface of the cover plate and the upper end surface of the bottom plate. The dielectric elastic body in the middle part of the cover plate and the bottom plate is the active area. The dielectric elastomer consists of multiple layers and single layers. Dielectric elastomers are superimposed, and the active area of each layer of dielectric elastomer is divided into multiple symmetrical sub-areas in the same way; flexible electrodes are coated on the upper and lower surfaces of each sub-area, and the adjacent flexible electrodes are kept Spacing: Aluminum foils are arranged one by one on the upper and lower surfaces of each sub-region, and are drawn out from the boundary formed by the bottom plate and the cover plate. The invention has the advantages of good flexibility, large driving force, simple structure, good versatility, simple structure, repeated use, low cost, no noise, no magnetism and easy installation.