Nanotechnology provides a new method on modified cement. It introduces the research and application of nanocement situation and existing problems in the paper. The nanocement has better mechanical properties and durability than the current ordinary cement, and it is environmentally friendly. It can improve the microstructure of cement in order to improve their physical and mechanical properties and durability, and it can reduce energy consumption. The current focus is to study the microstructure and mechanical properties of nanoconcrete, as well as how to prepare inexpensive nanomaterials. Future, the nanocement will have a wider application field.