The present invention relates to a motor-driving balance tuning cantilever beam adjustment frame. A balance tuning structure of a cantilever beam is formed by a motor 1, a linkage shaft 3, a rotor 4, a hanging wire 5, and a suspended ring 6 together, and the non-linear effect of the cantilever beam can be effectively reduced. A bracket 8 is provided with a scale with the precision of 1mm, through observing the change range of the intersection 12 of the bracket 8 and the cantilever beam 7 corresponding to the scale on the bracket, the tuning degree of a grating is determined, and thus the precise turning is achieved. A host computer 13 controls the rotation speed and time of the motor 1, and thus the linear automatic turning of a grating output spectral wavelength is realized. An error feedback module is formed by a strain sensor 14 attached to the cantilever beam 7 and the host computer 13, the cantilever beam is controlled to carry out real-time error compensation, and the linearity and repeatability of motor-driving balance tuning cantilever beam adjustment frame are ensured by closed-loop control. The motor-driving balance tuning cantilever beam adjustment frame has the advantages of simple process, low cost, high linear tuning degree and fast tuning speed, the error compensation can be realized, and the motor-driving balance tuning cantilever beam adjustment frame can be widely applied to the fields of optical sensing and optical devices.