Along with the rapid development of construction materials and the improvement of railway construction technologies, at present, the technical requirements for concrete and concrete mixing materials are totally different from those in the past. Under the requirements of durability and the development of construction materials and concrete technology, some new problems concerning invertfilling concrete, such as  the designed strength grade not matching the durability requirements, the designed mixing ratio being not able to meet the durability requirements and problems in the concrete construction and concrete curing,  have to be solved. The author discusses these problems in this paper and recommends some countermeasures to improve the designed concrete strength, to design the mixing ratio in accordance with the durability requirements and to strengthen the construction and curing management.