Characteristics of two-wave mixing in different BaTiO3 crystal are investigated. The results of experimental and theoretical analysis show that the energy transfer characteristics of contradirectional two-wave mixing (CTWM) is different from forward two-wave mixing (FTWM). The energy transfer direction of TWM depends not only on the orientation of the crystal c axis and the sign of the light-induced carriers, but also on the electro-optic coefficients. The experimental observation is in good agreement with theoretical analysis of CTWM in the crystal of 0°-cut type and 45°-cut type.