Carbon dioxide (CO2) emissions from construction industry in China account for approxi⁃mately half of the country′s total CO2 emissions. Given the frequent trade in the construction industryamong regions, it is crucial to clarify the regional responsibilities for emission reduction in order to for⁃mulate reasonable emission reduction policies. To address the CO2 emission situation and emissionreduction responsibilities of China′s construction industry across different regions, a multi -regionalinput-output fuzzy network linear programming method (MFEP) is proposed. This method incorporatesthree modules, namely input-output analysis, fuzzy processing, eco-analysis, as well as five types ofevaluation indexes. It enables the effective calculation of CO2 transfer amounts and sheds light on themutual utility relationship of transfers between regions, thereby elucidating the CO2 reduction responsi⁃bilities of construction industry in China between regions. The results indicate that emission reductiontargets should be lowered for provinces with rather high external contributions, such as Jiangsu (5.62)and Zhejiang (6.20), while emission reduction efforts should be increased for provinces with ratherhigh external dependence, such as Tianjin (5.61) and Hebei (6.41). Additionally, adjusting the cur⁃rent energy structure, which is predominantly reliant on oil, and increasing the utilization of newenergy sources like natural gas, can help offset the negative impacts of CO2 transfer. This research out⁃come serves as a scientific reference and provides a strong basis for decision-makers in formulating e⁃mission reduction policies for the construction industry.
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