With the advancement of science and technology

materials science has greatly developed.Especially

the development and application of polymer materials are considerably fast.The relationship between structure and properties in the new application environment has to be studied for many polymer materials.Therefore

it is very necessary to understand the variation of structure and properties of these polymer materials under some extreme conditions(high temperature and pressure

low temperature and pressure et al.).The structure and property of polymer materials are significantly affected by high pressure.A series of studies have been made on the crystallization and annealing of polyolefin

polyester

polyamide and so on under high pressure by scholars from home and abroad.A review of research progress in this filed is introduced in this paper.