The invention belongs to the technical field of treatment of tar dust-containing coal gas, and provides a device and a process for treating the tar dust-containing coal gas in a super-gravity method, which aims at solving the problems of the traditional tower that the packing is extremely likely to block, the dust removal resistance is high, and the dust removal of tiny particulate matters cannot be realized. The coal gas and an absorption solution contact and react in a super-gravity rotating packing bed, and the tar dust is adsorbed in the absorption solution to be discharged, so that the tar dust is trapped and recovered. The weaknesses that the packing is likely to block and the removal rate is low are overcome, high efficiency and rapidness in mixing with liquid can be realized, and a rapid reaction environment is provided. By adopting the method, the operation gas-liquid ratio can be reduced, the reaction equipment is reduced, the introduction quantity of process water is greatly reduced, the self washing of the packing is realized, the reaction time and the equipment size are greatly reduced, the treatment effect is improved, the operation cost is reduced, and the reaction can be performed in small-sized equipment. The energy is saved, the resource is reutilized, and the environmental protection significance can be realized.