Controlled/living radical polymerizations(CRPs) include ATRP,NMRP,RAFT polymerization and so on.Firstly,we utilize ATRP to control polymer topology.We propose simple methodologies by tuning the catalyst activity and monomer structures to obtain unprecedented branched,block,or aliphatic polyesters.1-4 These new type of polymers can be introduced with various functionalities depending on the targets of practical applications.