Abstract: In order to improve the level of railway engineering safety risk control,the relationship between risks, hidden dangers and accidents was analyzed. With reference to the laws and regulations and relevant documents on strengthening risk control and investigation, based on the progress made in the security risk classification control and hidden dangers investigation and management in the field of railway engineering.,the existing problems and shortcomings in security risk classification control and hidden dangers investigation and management in railway construction field were put forward. The corresponding countermeasures and suggestions were put forward in accordance with the practices of other industries. The results show that the construction of safety risk classification and management system of China's railway construction project is still in its initial stage, and there are still some gaps fromother related industries. Further improvements are needed in the implementation of national laws, regulations and policy requirements.

Key words: railway, construction, safety, risks control, hidden dangers investigations