NOVELTY - A glycine is produced by adding methyl alcohol or methyl alcohol aqueous solution in reactor, and adding urotropin to prepare urotropin methyl alcohol solution or urotropin methyl alcohol aqueous solution; infusing chloroacetic acid methyl alcohol solution or chloroacetic acid methyl alcohol aqueous solution in the reactor; and simultaneously infusing liquid ammonia for ammonolysis reaction.    USE - Method for producing glycine (claimed).    ADVANTAGE - The method uses catalyst urotropin that can be recycled.    DETAILED DESCRIPTION - Producing glycine comprises:    (A) selecting reactor for continuous reacting, the glycine ammonolysis reactor having condenser for recovering solvent methyl alcohol or methyl alcohol aqueous solution, the mixed crystal of glycine and ammonium chloride generated in the reactor can be separated instantly and the filtrate of the mixed crystal of glycine and ammonium chloride is taken back to the reactor;    (B) adding methyl alcohol or methyl alcohol aqueous solution in the reactor; and adding urotropin to prepare urotropin methyl alcohol solution or urotropin methyl alcohol aqueous solution, the urotropin solution being 3-20 wt.%;    (C) infusing chloroacetic acid methyl alcohol solution or chloroacetic acid methyl alcohol aqueous solution in the reactor; simultaneously infusing liquid ammonia for ammonolysis reaction; and controlling pH at 6.5-7.5;    (D) keeping the ammonolysis reaction temperature close to boiling point of methyl alcohol solution or methyl alcohol aqueous solution; condensing and recovering steam of the solution by a condenser; and keeping total amount of methyl alcohol or methyl alcohol aqueous solution in the reactor constant;    (E) instantly separating the mixed crystal solid glycine and ammonium chloride generated in the reaction out of the reactor by a crystal separating device; and filtering, centrifuging the urotropin solution of mixed glycine and ammonium chloride, and taking back to the reactor for recycling;    (F) stopping ammonolysis reaction when the urotropin methyl alcohol solution or urotropin methyl alcohol aqueous solution in the reactor is yellow; cooling and filtering the solution to obtain ammonium chloride solid; treating with nanofiltration device having nanofiltration membrane with cut-off molecular weight of below 300; stopping concentrating when the volume of nanofiltration cut-off liquid is 1/6 below that of the permeate; taking back the nanofiltration permeate in the reactor for recycling; preparing the nanofiltration cut-off liquid into aqueous solution containing 70-80% of methyl alcohol; and after a rectifying tower recovers the methyl alcohol, producing chemical fertilizer raw material product and aqueous solution containing ammonium chloride and by-product after performing catalytic oxidation; and    (G) adding water and heating the mixed crystal of glycine and ammonium chloride for dissolving, and recovering glycine using alcohol precipitation method.