NOVELTY - Dialkyl phosphite is added to glycine formaldehyde condensate solution, reacted, washed, and obtained N-dialkyl phosphonomethyl glycine is cooled to separate triethylammonium hydrochloride crystals. Filtrate is washed with washing liquid to obtain solution (E). Concentrated hydrochloric acid is added to solution (E), and refluxed. Obtained product is decompressed, and distilled. Sodium hydroxide solution is added to obtained mixture, neutralized and pH is adjusted. Water is added to concentrated solution, cooled, filtered, and dried to obtain glyphosate solid.    USE - Manufacture of glyphosate solid (claimed).    ADVANTAGE - The method efficiently and economically provides glyphosate solid, by simple method without affecting the environment.    DETAILED DESCRIPTION - Methanol as solvent, chloroacetic acid, and triethylamine are mixed in the molar ratio of 1:0.9-1.1:5-8, at 30-70 degrees C for 10-30 minutes to obtain solution (A). Methanol, p-formaldehyde and ammonia are mixed in the molar ratio of 1:1-2:2.5-4, and reacted at 10-20 degrees C for 30-50 minutes to obtain solution (B). The obtained solution (B) is added to solution (A), and reacted at 0-10 degrees C for 10-30 minutes to obtain solution (C), such that molar ratio of chloroacetic acid and p-formaldehyde is 1:1.2-2. The obtained mixture is maintained at 0-10 degrees C, and triethylamine and p-formaldehyde are added, until the reaction system is transparent. The temperature of the reaction mixture is increased at 38-42 degrees C, and reacted for 8-100 minutes to obtain glycine formaldehyde condensate solution, such that the molar ratio of acetic acid, triethylamine and p-formaldehyde is 1:0.6-1.2:0.5-3. To the obtained solution, dialkyl phosphite is added and reacted at 5-48 degrees C for 120-150 minutes. The obtained product is washed with methanol to obtain N-dialkyl phosphonomethyl glycine. The obtained product is then cooled to 0-10 degrees C, and triethylammonium hydrochloride crystals are separated. The filtrate is washed with washing liquid to obtain solution (E), such that molar ratio of chloroacetic acid and dialkyl phosphite is 1:1.5. Triethylammonium hydrochloride crystals are washed with methanol at room temperature, such that molar ratio of triethylammonium hydrochloride crystals and methanol is 2:1. At 10-25 degrees C, concentrated hydrochloric acid is added to solution (E), and the temperature is increased to 110-120 degrees C and refluxed. The obtained product is decompressed, distilled for 60-120 minutes, and the temperature is controlled at 110-120 degrees C, decompressed and distilled. Sodium hydroxide solution is added to the obtained mixture, neutralized, and pH is adjusted to 3. Water is added to concentrated solution, cooled, filtered, and dried to obtain glyphosate solid.