The invention discloses an industrial water-containing hydrogen chloride gas dehydration device and a dehydration method, belongs to the technical field of gas treatment, and aims to solve the problem that in the prior art, when hydrogen chloride gas is subjected to dehydration treatment, purchased dehydration chemical agents are mostly in contact with gas to complete dehydration of the hydrogen chloride gas. The device comprises a dehydrating tower, a feeding pipe is fixedly mounted at the upper end of the dehydrating tower, and a discharging pipe is fixedly mounted on one side, far away from the feeding pipe, of the dehydrating tower; a heating block and a first motor are started, the heating block enables a heat conduction disc to be heated through a heat conduction rod, the heat conduction disc enables various chemical agents to be heated, the first motor enables a first rotating rod to rotate, the first rotating rod enables stirring blades to rotate through a connecting sleeve, the stirring blades stir the various chemical agents, and therefore heating and stirring of the various chemical agents are conveniently completed; therefore, the effect of the prepared dehydration chemical agent is effectively improved.