Azobenzene-containing liquid crystalline block copolymers represent a special category of block copolymers and functional materials.The combination of photoresponsive properties of azo polymers and hierarchical supramolecular structures of liquid crystalline block copolymers leads to their unique characteristics and functions.Research in this field has generated a number of new block copolymers and recorded some newly discovered properties of the copolymers.In this review
a few examples were chosen to discuss the recent developments in this area with emphasis on the photoinduced morphological changes and holographic properties of this type of polymers and materials.