Combined with a project case,based on the improved calculation model for wetting deformation,Duncan-Chang E-B model was adopted to simulate the rockfill embankment. This paper studied the effects of wetting deformations upon rock-fill and face slab of CFRD. The research results indicated that the effect of rockfill material wetting deformations made the dam embankment settlement increases,and the increment of face slab pressure stress was so large that an unfavorable effect upon the face slab stress deformation was generated.