The invention relates to a process and device for recycling organic waste gas by a refrigeration mode, wherein the process and device can be used for water gas recycling in the production process of a polystyrene board in the printing industry. The device comprises a drying device, a heat exchanger, a gas conveying device, a refrigeration device and a separation tank, wherein silk screens are installed on the upper part of the separation tank; the gas conveying device is positioned between a first water cooler and a second water cooler or is positioned between the first heat exchanger and a polystyrene production line; after high-temperature waste gas is subjected to water cooling and low-temperature refrigeration, organic matters are cooled down; at the temperature of minus 60-20DEG C and under the pressure of 0-5MPa, after flash evaporation and gas and liquid separation, waste gas containing less organic matters exchanges heat with the deep-cool waste gas; after cold quantity is recycled, the waste gas is introduced to the polystyrene production line to be used as the sweep gas for recycling or discharged directly; when the treated waste gas is used as the sweep gas for recycling, the organic solvent recovery rate is greater than 99.5%; and when the treated waste gas is discharged directly, the organic solvent recovery rate is greater than 85%. According to the invention, the process and device have the advantages that process is simple, operation is convenient, recovery rate of organic waste gas is high and the like, and continuous recovery can be realized.