The low mode energy of deuterium is calculated by quantum mechanics theory and deuterium zero-point vibration energy. The smooth, uniformity, euphotic solid deuterium film is obtained by home-made planar cryotarget system. The infrared absorption spectrum of solid deuterium film is studied by infrared spectroscopy system. The strong absorption peaks mostly result from the Q1(0)+S0(0), Q1(0)+S0(1), Q1(0)+S0(0)+S0(1) vibration, rotation modes. The experimental data are in good agreement with the analysis results.