NOVELTY - Production of acetochlor comprises charging 2-methyl-6-ethylaniline (MEA) and p-formaldehyde in a methylene reaction kettle (9), charging stabilizing agent and catalyst, stirring, heating to 60 degrees C, vacuumizing at - 0.098 MPa, and dewatering; atomizing to the methylene reaction kettle until the temperature is 100 degrees C, pumping methylene and chloroacetyl chloride in a static mixer (5) respectively via a methylene metering pump (2) and an acyl chloride metering pump (3), and cooling at 50-100 degrees C; and controlling the temperature in the reactor at 50-100 degrees C.    USE - Method for the production of acetochlor (claimed) used in a chemical herbicide for corn, soybean, and cotton.    ADVANTAGE - The acetochlor has low toxicity, and is inexpensive.    DETAILED DESCRIPTION - Production of acetochlor comprises:    (A) charging MEA and p-formaldehyde in a methylene reaction kettle (9), charging stabilizing agent and catalyst, stirring, heating to 60 degrees C, vacuumizing at - 0.098 MPa, and dewatering;    (B) when the temperature rises to 90 degrees C, starting a circulating pump (1) for atomizing to the methylene reaction kettle until the temperature is 100 degrees C, pumping methylene and chloroacetyl chloride in a static mixer (5) respectively via a methylene metering pump (2) and an acyl chloride metering pump (3), and cooling via freezing salt water to control the temperature in the static mixer at 50-100 degrees C;    (C) entering a pipeline reactor comprising a first section tubular reactor (6) and a second section tubular reactor (7), cooling the first section tubular reactor with circulation water, controlling the temperature in the reactor at 50-100 degrees C, and heating the second section tubular reactor with hot water; and    (D) controlling the temperature in the reactor at 50-100 degrees C to obtain an intermediate with content of not less than 95%.    DESCRIPTION OF DRAWING(S) - The drawing is a flow diagram of the production of acetochlor.