The reaction tower is filled with special solid composite packing, and the packing is filled with composite catalyst. When the odor and organic waste gas pass through the packing layer under the action of the induced draft fan, fully contact with the solid packing surface through the special nozzle agent, and under the catalysis of the catalyst, the pollution factors in the odor and organic waste gas are fully decomposed. It is applicable to a wide range, especially for the treatment of large gas volume, medium and high concentration waste gas, and has a good removal rate of hydrophobic pollutants. Small land occupation and low investment; Convenient management, ready to use; It is resistant to impact load and is not easily affected by pollutant concentration and temperature change. A certain amount of agent needs to be consumed, the operation cost is high, and the catalyst will be poisoned if it is not operated properly, resulting in secondary pollution.