Abstract: Polyethylene oxide(PEO) macromers with allyl-cnd group were synthesized by two different methods (initiating and deactivating). The products obtained were, by means of several techniques, including ¹H-NMR, IR,VPO, GPC and the double-bond titration, characterized accurately, and the results show that such kinds of product possess expected structure. The macromers were copolymerized with smalt molacular acrylamide, and a series of copolymers with different composition can be obtained by adjusting copolymerization condition. Moreover, some evidence concerning allyl-groups rearrangement in synthesis of the macromers has been observed and suitable condition for laboratorial preperation of macromers has been proposed.