Fourier transform Raman scattering spectra and current-voltage (I-V) features were measured for Cd_1-xZn_xTe(x=0.04) surfaces of different treatments. By analyzing the anti-stokes Raman spectra and comparing with surface current-voltage (I-V) curves, it was concluded that the behavior of the lattice phonons which are associated with surface treatments reflects the perfection-variation of Cd_1-xZn_xTe(x=0.04) surface. It was also found that Te precipitates on Cd_1-xZn_xTe(x=0.04) surface are crucial to surface quality. In addition, potential application of the different surface treatments was discussed.