The light-induced shape-memory polymers are one kind of new materials that show shape-memory effects if they can be deformed and fixed into a temporary shape by light

and recover their original

permanent shape only on exposure to another light with different wavelength

thereby complete their memory". These materials have their unique properties such as non-contact

instantaneity

localized effect and cleanness

which have attracted increasing more and more attention to scientists worldwide. This paper presents a brief review of current progress in the area of light activated shape- memory polymers and shape-changing polymers which are mainly involved in photochemical reaction types such as having cinnamic groups and azobeneze group. Their category

unique advantage

potential application and memory working mechanism are described. Problems to be solved and future development are discussed and in addition

the application trends are prospected.