The invention discloses a production device for a liquid phase reaction and provides a closed cycle production and gas recycling device with the advantages of simple structure, high gas recovering rate, environment friendliness and energy conservation; the technical problems that the production device in the liquid phase reaction in the prior art uses more equipment devices, is tedious in production process, relatively low in gas recovering rate and high in energy consumption, and easily causes pollution to a periphery environment and the like are solved; the production device comprises a reaction kettle and a reaction kettle jacket arranged at the bottom of the reaction kettle; a reaction kettle discharging opening in the reaction kettle communicates with a stillpot feeding opening in a stillpot through a first centrifugal machine; a stillpot discharging opening in the stillpot communicates with a reaction kettle feeding opening in the reaction kettle through a second centrifugal machine; a precipitant collecting device is also connected to the stillpot in parallel; a precipitant evaporating opening in the reaction kettle communicates to the precipitant collecting device through a preceding-stage compressor.