The invention relates to a technique for combined treatment of various foul gases in the coal chemical industry and belongs to the technical field of waste gas treatment in the coal chemical industry. The treatment technique comprises the steps that (1) waste gas pretreatment is conducted, foul gases are introduced into a water-washing tower to be subjected to deoiling and dedusting, and then the foul gases enter a deamination tower for deamination treatment; (2) waste gas incineration is conducted, the gases are introduced into a combustion device, the combusted gases enter a waste gas incinerator to be completely incinerated and decomposed, and the purposes of deodorization and degassing are achieved; and (3) high-temperature smoke enters a waste heat recycling device for waste heat recycling after being treated through the waste gas incinerator, and the smoke is subjected to up-to-standard emission after desulfurization treatment. According to the treatment technique, the foul gases are completely incinerated and decomposed into components such as SO2, CO2, H2O, NO and NO2, and the purposes of deodorization and harmful gas removal are achieved. By means of the treatment technique, the purpose of treating the various foul gases simultaneously in the coal chemical industry can be achieved, and the technique for combined treatment of the various foul gases in the coal chemical industry is economical, easy to operate, safe, environmentally friendly and complete and good in waste gas treatment effect.