The background to bring forward the 120 km/h speed increase reform project and the determination principles of the technology scheme are mainly described.

Described are the technical scheme and operation effect of the ice-cooled refrigerator car being reformed into the alternate box car and the 120 km/h speed increase reform.

An important act for the takeoff of railway development is existing line speed-raising reconstruction, whereas seamless track laying is an critical technology in reconstruction.

The aim of the thesis is to recognize the meaning of railway acceleration and evaluate the social benefit of it scientifically,this is of very importance to further the speed accerleration of railway well,and promote sustainable development of the national economy and communication and transportation.

According to the current status and problems existing in railway track maintenance management for speed-up railway in China,this paper combines the track geometric data from typical railway lines and their management needs,develops a track integral maintenance system,and introduces the functions,software structure and the typical applications of this system.