The invention relates to a method for continuously recovering by-products from tail gas obtained by hydrolyzing glyphosate, and belongs to the technical field of the recovery of glyphosate hydrolyzing tail gas. The method comprises the following steps: after alkali cleaning is performed on the tail gas obtained by hydrolyzing the glyphosate, neutral tail gas is obtained, and the neutral tail gas enters a primary rectifying tower to be processed; a liquid phase of the primary rectifying tower enters a dewatering tower, a liquid phase of the dewatering tower is rectified waste water, and a gas phase of the dewatering tower is condensed to obtain finished methanol; a gas phase of the primary rectifying tower enters a methanol rectifying tower to be processed, a liquid phase of the methanol rectifying tower is the finished methanol, and a gas phase of the methanol rectifying tower is pressurized, condensed and decompressed to obtain finished methylal; and noncondensable gas enters a water scrubbing tower to be processed, a gas phase of the water scrubbing tower is dried and compressed to obtain finished monochloromethane, a liquid phase of the water scrubbing tower enters a stripping tower to be processed, a gas phase obtained in the stripping tower enters the primary rectifying tower to be recovered again, and the obtained liquid phase enters the water scrubbing tower to be recycled. Through the adoption of the method disclosed by the invention, the energy utilization rate in the synthetizing process of the glyphosate is increased, and the quality of the by-products in the synthetizing process of the glyphosate is improved.