In order to verify the intensification effect of LPC?RPB (Layered Packing Cross-flow Rotating Packed Bed) on gas-side mass transfer, optimize the device structure and improve the mass transfer efficiency, the gas-film limited system of the absorption process of SO2 by NaOH solution was applied in this work. The influence of high gravity factor β, empty bed gas velocity u and liquid spray density q on volumetric gas-phase mass transfer coefficients (kyae) and the intensification effect were investigated. The results indicated that the kyae values increased with the increase of β, u and q. Under the conditions of β=55, u=1.53 m/s and q=3 m3/(m2?h), kyae can reach 28 s?1, which is 10~75 times higher than the spray column and 1.4~2.2 times than the traditional cross-flow rotating packed bed. Besides, with the characteristics of milder operating conditions, simpler structure and lower energy consumption compared to SP?RPB (Split Packing Rotating Packed Bed), LPC?RPB showed a good performance of effectively intensifying the gas-film controlled mass transfer process.