Abstract Research purposes: In combination with the working practice and demand， the systematical analysis of the mechanic effect of the curve super － elevation on the railway technical condition is made for the purpose of providing the reference and guidance to the design of the railway track．
Research conclusions: The curve super － elevation is one of important technical conditions for the track plane design，the track vertical section design and the track design． ( 1) The curve super － elevation can influence the choice of the technical standards，such as the curve radius and the speed target value． ( 2) The curve super － elevation can influence the stipulating the technical conditions，such as the maximum and minimum speeds of the curved track，the length of the transition curve，the railway clearance and the model selection of the track． ( 3 ) The curve super － elevation can influence the railway traffic safe and economic indexes，such as the railway traffic safety，the passenger comfortableness and the operational and maintenance costs．
Yang Yueqin． Choice of Main Technical Parameters for 250 km/h Raiway Line for Mixed Passenger and Freight Traffic［J］． Journal of Railway Engineering Society，2009( 7) :38 － 42．
2011, Vol. 28 
