The invention discloses a method for recycling methane chloride from glyphosate synthetic tail gas, and the method solves the problems of high recycle energy consumption of methane chloride, low recycle rate, use of organic solvent, and generation of secondary pollution in the prior art. The method includes steps of A, orderly water-washing, alkali-washing and drying the synthetic tail gas of glyphosate; B, recycling methane chloride from liquefied recycling tail gas by compression and three-grade condensation method; C, introducing the condensed tail gas to a pressure swing adsorption system consisting of absorption towers filled with solid absorbent; through the absorption function, separating and gathering trace amount of methane chloride, and releasing the product gas enriched in high-concentration methane chloride through desorption; D, returning the product gas to an inlet of the compressor, and repeating the step B and the step C along with the dried tail gas. The method is simple in technique, simple in operation, high in methane chloride recycle rate, small in energy consumption; the method does not use organic solvent and not generates the secondary pollution.