The utility model relates to the technical field of methanol rectification. The device is a normal-pressure tower top cooling device for methanol rectification. The device comprises an air cooler, a first water cooler, a second water cooler and a reflux tank, a middle liquid inlet of the air cooler is fixedly communicated with a third condensation pipeline; a first condensation pipeline is fixedlycommunicated between a middle liquid outlet of the air cooler and a top liquid inlet of the second water cooler; a second condensation pipeline is communicated between the first condensation pipelineand a liquid inlet of the second water cooler, a fifth condensation pipeline is fixedly communicated between a liquid outlet in the bottom of the first water cooler and a liquid inlet in the top of the reflux tank, and a fourth condensation pipeline is communicated between a liquid outlet in the bottom of the second water cooler and the fifth condensation pipeline. The device is reasonable and compact in structure and convenient to use, can effectively solve the problem of gas-phase condensation at the top of a normal-pressure tower, relieves the phenomenon that the medium cannot smoothly flow to a reflux tank due to air resistance because of more light components in the medium, and has the characteristics of safety, labor saving, simplicity, convenience and high efficiency.