Research purposes: Under the background of Government-corporation separation, new situation and impact on railway construction management will be discussed. Thus some suggestions will be pointed about how to change management style for National Railway Administration and China Railway Corporation. Research conclusions: (1) Separation work of government and corporation almost done. China Railway Corporation still has authority managing specific railway construction projects. Ministry of Railway will in charge of Regulations and Standard, and execute Quality, Safety, Market management;(2) Based on the function of National Railway Administration, multi-objective implementation ability shall be raised for the strengthen management of Quality and Safety supervision. In other hand, China Railway Corporation will lose the identity of Government and advantage of coordination but just as a company. As a result, it will be harder to carry forward the progress of railway construction;(3) Thus at this changing period, some suggestions were carry out: National Railway Administration should enhance the concept of law and responsibility. Project manager should change the management style and give more attention for market and contract, in order to realize the project governance not only project management;(4) The research result can be applied in Construction Management field and can be reference for construction management reformation of National Railway Administration and China Railway Corporation. In March 2013, the original Ministry of Railways was abolished. According to "the State Council Organization Reform and Function Transformation Plan", National Railway Administration and China Railway Corporation were created. But until 2014, National Railway Administration was already established. Thus separation work of government and corporation can be work done officially. Based on the background of government-corporation separation, we will focus on the transformation problem of railway construction management under the new situation.