The invention discloses a coupling large-offset automatic compensation device which comprises an equipment shaft sleeve, a compressing spring, an encoder shaft sleeve and two large-offset compensation rubber rings arranged in a cylindrical support; the support is fixedly connected with an equipment shaft front edge; an equipment shaft below the inside of the support is sleeved with the equipment shaft sleeve; the compression spring is connected above the equipment shaft sleeve; the other end of the compression spring is connected with the encoder shaft sleeve; the encoder shaft sleeve is connected with the input shaft of a resolver encoder; the top of the support is fixedly connected with a large-offset compensation rubber ring through a pressure plate; and the other large-offset compensation rubber ring is sleeved on the periphery of the resolver encoder. The coupling large-offset automatic compensation device has the advantages of the capability of wide range compensation of relative offset of two shafts, no impact by the relative offset of the two shafts caused by installation error, impact, vibration, temperature change and other factors, complete electrical isolation of the resolver encoder and the equipment, simple structure, convenient installation, advanced design and universality.