By taking the advantages of a Liquid Crystal Spatial Light Modulator(LCSLM) in large stoke, high density and a lower voltage driver, an adaptive optical(AO) system for correcting the aberration of the human eye was developed by using the LCSLM as a key element. The modulation principle of LCSLM was introduced and the relation curve between the phase modulation and the drive voltage was also measured by a ZYGO interferometer. Then, the Shack-Hartmann wavefront sensor and LCSLM were used for aberration detection and correction, respectively. For a subject eye with 5 m-1(5D) mopia, the wavefront error is reduced to 0.086λ PV and 0.013λ RMS after adaptive optics (AO) correction, which has reached the diffraction limit. Furthermore, the blurred photoreceptor cell on the fundus oculi is clearly imaged on a CCD camera. These results show that the LCSLM based adaptive optical system has the ability of correcting the aberration of the human eye efficiently, and the quality of image is also improved a lot.