Abstract: This paper systematically summarized the main achievements of China intelligent high-speed railway (IHR) in top-level design, key technology innovation, infrastructure platform construction, engineering demonstration and application, analyzed the internal and external situations and requirements faced by China IHR during the 14th Five Year Plan period, put forward the connotation of IHR2.0 and its intergenerational characteristics mainly embodied in four aspects of system positive design, full professional collaboration, cross industry integration, and predictive analysis, built the IHR2.0 architecture from the dimensions of technical system, data system and standard system, planned the key research tasks and implementation paths of intellectualization in the fields of construction, equipment, operation, etc. It can provide important guidance for the research and application of IHR2.0 during the 14th Five Year Plan period.