Abstract: We conducted a series of experiments on integrated spectra of (3/2)ω0 light in hohlraum targets on LF-11# laser facility. The (3/2 )ω0 spectra of planar targets were also measured as a comparison.Two peaks appeared in the spectrum of hohlraum target. One of them was red-shifted, and the other blue-shifted, It was found that the intensity of (3/2 )ω0 light of hohlraum targets was much greater than that of planar targets.