In order to study the implementation effect of Special Protection Period Policy of Air Pollution Control, this paper uses the DID model and the pollution monitoring data with panel data of ChangshaZhuzhouXiangtan area, Hengyang, Yueyang and Changde, and analyzes the industries which have significant impact on specific pollutant emission. The results show that the implementation of the special protection period model has a promoting effect on CO emissions , estimated to 0.505, and an emission reduction effect on PM2.5 emissions, estimated to -11.68; the catering industries have significant effects on CO emissions while the construction industry and the transportation industry have significant impacts on PM2.5 emissions. This shows that the implementation of the special protection period model has different effects on different pollutants; in order to achieve better atmospheric pollutant emission reduction effects, it is necessary to strengthen control over different pollutants at the industry level.