Abstract: The technology of crush sidewall is a new technique applied in concrete faced rockfill dam(CFRD) for construction and protection of pad layer(IIA material). Some problems about the crush sidewall of Shuibuya project are discussed with FEM analysis. The results indicate that the crush sidewall of Shuibuya CFRD will not affect the slab face and joints very much, the dislocation of both the slab face and crush sidewall is not big,provided that the restraint between the slab face and crush sidewall is small while the restraint between the crush sidewall and pad layer is large, the crush sidewall has low strength and modulus,with Polson ratio 0.25～0.30, inner friction angle no less than 40°.?