Long-wave infrared (LWIR) laser sources from 8 μm to 12 μm are promising to many fields, such as directional infrared countermeasures (DIRCM), ranging and targeting, standoff detection, trace gas monitoring, spectrum analysis and wireless communications. With the development of laser wavelength to LWIR, high-performance LWIR nonlinear crystals are urgently required．Because the performance of nonlinear optical crystals, including CdSe, GaSe, ZnGeP2, AgGaSe2, LiInSe2, CdGeAs2, BaGa4Se7, is seriously influenced by transparency range, nonlinear coefficient, thermal conductivity and wavelengths of pump, quasi-phase matching(QPM) materials with excellent performance, like OP-GaAs, OP-GaP and OP-ZnSe, can be used to produce long-wave infrared laser to overcome these defects. In this paper, the quasi-phase matching materials for LWIR generation are reviewed. Their research progresses are presented from the aspects of materials performance, preparation technology and laser application. The application potentials and technical bottlenecks are analyzed.