Triclopyr production method

The invention provides a triclopyr production method. Firstly, sodium trichloropyrindinol and methyl chloroacetate have etherification reaction in a polar solvent to generate a midbody trichloropyridine peroxyacetic acid methyl ester, and trichloropyridine peroxyacetic acid methyl ester is subjected to alkaline hydrolysis and acidification in an aqueous phase to obtain triclopyr. When etherification reaction is conducted, reaction temperature is low, conditions are mild, reaction time is shortened, post-processing is simple, and the yield is high. A dispersing agent and a phase transfer catalyst are used during alkaline hydrolysis and acidification, alkaline hydrolysis and acidification are conducted in the aqueous phase, the amount of three wastes is reduced, reaction conditions are mild, the yield is high, production cost is low, industrial production is facilitated, and the yield of two-step reaction can reach 94% or above.