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Since 2012, the frequent occurrence of haze pollution events in China has had a serious impact on people’s work and life. In this paper, the threshold effect, spatial autoregressive and spatial Dubin models are used to study the threshold characteristics and spatial effect of technological innovation, environmental regulation and the agglomeration of electric power and thermal power industries on haze pollution. It is concluded that the excessive agglomeration of electric power and thermal power industries is not conducive to the prevention and control of haze pollution, technological innovation is conducive to the control of haze pollution, and strengthening environmental regulation is conducive to the control of haze pollution. Electric power and thermal power industries are important sources of haze pollution and have obvious spatial spillover effects. Some policy suggestions are given, such as moderate control of the agglomeration scale of electric power and thermal power industries, strengthening the technological innovation of electric power and thermal power industries, systematic optimization of environmental regulation and strengthening the joint prevention and control of haze pollution in different regions to provide help for the scientific regulation and control of the agglomeration level of electric power and thermal power industries in different regions and effectively reduce the influence of haze pollution.