This study, for the development of next generation high speed railway system of a train which has maximum speed over 400km/h, is to develop core generic environmental technologies which are soundproof technology. Also this technology contains the emitting noise performance of high speed operated trains. The ultimate purpose of this study is to develop a new technology of core sound proof system which is more economical and efficient to cope with the noise increased about 7~9dB as the operating speed increased to 400km/h. In view of technology, this study is to the new soundproof shape design, noise absorbing material development, core soundproof facility development, noise reduction method which contains the aerodynamic characteristics of noise, the concrete bed track reflecting noise reduction, the specifications absorbing block of concrete bed and the installation and management of core soundproof system.