Abstract:The dynamics of polymers confined to nanometer length scale have attracted considerable scientific and technological interest because they affect the stability and performance of nanomaterials. The viscoelasticity of polymer approaching nanometer scale, such as viscosity, modulus, has been widely reported to deviate from its bulk properties. This paper represented a review on the viscoelasticity of the polymer films in nano-confinement. The experimental method for studying viscoelasticity of nano-confinement polymer and physical mechanisms responsible for the deviation of chain dynamic from that in bulk was summarized. Furthermore, the future development of the viscoelasticity of nano-confinement was prospected.