this invention offers a functional vinyl halide polymer that has excellent processing properties for the end - user processing without any extra processing aid . this functional vinyl halide polymer has good fusion , lubrication and melting strength in processing . the finished products show a good characterization of high transparence , low air - mark and low flow - mark . the functional vinyl halide polymer is produced by a solution , bulk or suspension polymerization . vinyl halide or a monomer mixture comprising mainly vinyl halide is polymerized in an aqueous medium in the presence of an acrylic copolymer latex / powder to obtain the functional vinyl halide polymer . the functional vinyl halide polymer manufacturing process mainly comprises the copolymerization or graft - polymerization of : 90 . 0 wt %˜ 99 . 9 wt % based on the total composition of the vinyl halide or the monomer mixture , and 10 . 0 wt %˜ 0 . 1 wt % based on the total composition of the alkyl acrylate monomers or the acrylic polymer latex / powder , wherein the former can be added stepwisely or all in one time and the later can be charged continuously into reactor during polymerization or charged into a reactor before polymerization .