TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: The vinyl amino acid (ester) of formula =CH-R2-X-R1-CH(NHR)-COOR4 is prepared by reacting amino acid (ester) of formula H-X-R1-CH(NHR)-COOR4 and alkenyl halide of formula Z-R2-CH= with mol ratio of 1:1-10 in ketones with 2-20 carbons, alcohols with 1-15 carbons, ethers with 2-15 carbons or halogenated organics with 1-10 carbons as solvent under action of potassium carbonate or sodium carbonate as catalyst at 0-200 degrees C for 1 hour-5 days in which mol ratio of amino acid (ester) to catalyst is 1:0.5-30.Z=Br, I, Cl or F.When number of carbon atoms of R2 group is not less than 2, then Z and vinyl are not connected with same carbon atom. Preferred Composition: The initiator is azo initiators, peroxide initiators, oxidizing-reducing type initiators, atom transfer radical polymerization (ATRP) type initiators, reversible addition fragmentation chain transfer (RAFT) type initiators or initiator-transfer (Inifer) type initiators as free radical polymerization initiators, lithium alkyl as anion polymerization initiators or initiators for achieving cation polymerization by initiating alkene monomers as cation polymerization initiators. The catalyst is Ziegler-Natta catalyst, metallocene catalyst, constrained geometry complex (CGC) type catalyst or non-metallocene catalyst as coordination polymerization catalysts. The copolymerizing monomer is non-polar vinyl monomer or polar vinyl monomer of formula CH2=CH-Y.    TECHNOLOGY FOCUS - POLYMERS - Preparation (claimed): The vinyl amino acid (ester) polymer (1) or (2) is prepared by adding initiator or catalyst in preparation process and processing reaction in water, aliphatic solvents with 5-30 carbons, aromatic solvents with 6-30 carbons or polar organic compounds with 1-30 carbons as solvent under protection of nitrogen or argon as inert gas in which mol ratio of monomer of vinyl amino acid (ester) to initiator is 1:0.00001-0.1, polymerization temperature of vinyl amino acid (ester) is 0-300 degrees C, copolymerization temperature of vinyl amino acid (ester) and copolymerizing monomer is 0-300 degrees C, polymerization time of vinyl amino acid (ester) is 30 minutes-73 hours and copolymerization time of vinyl amino acid (ester) and copolymerizing monomer is 30 minutes-73 hours. SPECIFIC COMPOUNDS - 4 Compounds (1) or (2) are specifically claimed, e.g. vinyl amino acid polymer, vinyl amino acid ester polymer, vinyl amino acid copolymer or vinyl amino acid ester copolymer.