The exotic behavior of nuclei approaching the drip lines is one of the main subjects in the nuclear physics studies.The loosely bound nucleons can oscillate against the isospin saturated core.Large enhancement of electric dipole response is expected in the low-energy region,namely the pygmy dipole resonance(PDR). The exotic behavior of nuclei approaching the drip lines is one of the main subjects in the nuclear physics studies. Loosely bound nucleons can oscillate against the isospin saturated core. Large enhancement of electric dipole response is expected in the low-energy region, for the pygmy dipole resonance (PDR).