Industrial production method of chloromethyl pyridine derivative

The invention discloses an industrial production method of a chloromethyl pyridine derivative. The industrial production method comprises an oxidation reaction process, a nitration reaction process, a replacement reaction process, a rearrangement hydrolysis reaction process and a chloromethylation reaction process. 2,3-dimethyl pyridine as a raw material undergoes an oxidation reaction to produce a pyridine N-oxide, the pyridine N-oxide undergoes a nitration reaction to produce 2,3-dimethyl-4-nitropyridine-N-oxide, the 2,3-dimethyl-4-nitropyridine-N-oxide undergoes a replacement reaction to produce 4-alkoxypyridine-N-oxide, the 4-alkoxypyridine-N-oxide undergoes a rearrangement hydrolysis reaction to produce a 2-hydroxy-4-alkoxypyridine compound, and the 2-hydroxy-4-alkoxypyridine compound undergoes a chloromethylation reaction to produce the refined chloromethyl pyridine compound. The industrial production method realizes recycle of waste produced in production, realizes environmental protection and waste comprehensive utilization, changes waste into values and injurants into benefits, greatly reduces a production cost and improves product competitiveness.