The invention discloses an industrialized production method for continuous preparation of 2-chloro-5-methylpyridine and relates to the technical field of production of pesticide intermediates. The industrialized production method for continuous preparation of the 2-chloro-5-methylpyridine includes the step of preparing the 2-chloro-5-methylpyridine with benzylamine as a main starting material and triphosgene or phosgene as a chlorinating agent in the presence of a catalyst in a tanks-in-series manner. The industrialized production method for continuous preparation of the 2-chloro-5-methylpyridine has the advantages that defects of small capacity of intermittent reaction equipment, unstable quality control and long-time preparation can be overcome; the preparation method is high in reaction yield and excellent in product quality, a total preparation yield is not less than 87.0%, and 2-chloro-5-methylpyridine content is not less than 99.5%.