The infrared spectra of La0.65BaxMnO(3-|?￡（c） （x = 0.35, 0.33 and 0.30） were investigated experimentally. The result shows that the sample La0.65BaxMnO(3-|?￡（c） has the largest Curie temperature and the smallest resistivity and wave number of the stretching vibration mode of MnO6 octaheUron at 300 K among the investigated samples. However, the absorption strength for the stretching vibration mode of Mn06 octahedron in La0.65BaxMnO(3-|?￡（c） is stronger for parainagnetic phase than that for ferromagnelic phase, which may be connected with the reducing of the dynamic in- coherent Jahn-Teller distortion below Curie temperature. In addition, the large shift of wave number for the stretching mode at the temperatures from 293 to 423 K has been observed in La0.65BaxMnO(3-|?￡（c）, which may be due to the in- crease of the Mn-O bond length with temperature increasing.
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