The invention provides a vertical bottom stirring reaction still and an environment-friendly process for producing hexanedioic acid through a still reaction. The vertical bottom stirring reaction still mainly comprises a reaction still main body and a heat exchanger, wherein self-sucking stirring paddles are arranged in the reaction still main body; a hollow gas guide pipe is arranged in the centres of the self-sucking stirring paddles; the gas above a liquid surface in the still can be sucked below the liquid surface to participate in the reaction again through centrifugal force; the heat exchanger consists of built-in heat exchange pieces and a jacket; the built-in heat exchange pieces are arranged vertical to a cylinder body in parallel; and the surfaces of the built-in heat exchange pieces adopt concave-convex structures to strengthen the turbulent flow between the gas and liquid, so that the gas can be in full contact with the liquid. The vertical bottom stirring reaction still and the environment-friendly process for producing hexanedioic acid through the still reaction have the beneficial effects that: the still is used as a reactor, so that the following problems can be solved: 1, a safety problem, namely that the gas participates in the reaction more easily by adopting a bottom stirring mode, and thus the accumulation of oxygen and organic gas can be effectively prevented so as to avoid combustion and explosion; 2 effective control of temperature is realized; and 3, full contact of the gas and the liquid is realized.