The invention relates to a supporting device for high-accuracy adjustable optical elements and belongs to the technical field of manufacturing, mounting and adjusting of high-accuracy optical elements. The supporting device comprises a mirror frame with a three-point fixed support, adjustable flexible auxiliary supporting elastic pieces, multistage displacement contraction flexible hinges, threaded adjusting rods, threaded locking springs and screws, the three-point fixed support is used for bonding of the optical elements, the adjustable flexible auxiliary supporting elastic pieces play a role in auxiliary supporting of the optical elements, and the multistage displacement contraction flexible hinges, the threaded adjusting rods and the threaded locking springs form a high-resolution displacement adjusting mechanism to adjust positions of the adjustable flexible auxiliary supporting elastic pieces. The supporting device can be widely applied to refractive, reflective, planar, spherical and aspheric optical elements, harsh requirements, on
processing accuracy, of the high-accuracy supporting device can be lowered effectively, uniform supporting force and nonuniform supporting force are provided to the optical elements accurately, and deformation caused by
dead weight of the optical elements is avoided effectively while the supporting device has active deformation capability.