Under the “dual carbon” target, the topic of corporate ESG information disclosure has become a hot research topic nationwide. As China is still in the initial stages of sustainable disclosure, most research solely concentrates on the rating of ESG information, overlooking the quality of ESG information disclosure. Therefore, from the perspective of sustainable disclosure standards for enterprises, taking the construction machinery industry as the research sample, a fuzzy comprehensive evaluation model was adopted to establish a quality evaluation system for enterprise ESG information disclosure, in order to assist the subsequent application of sustainable disclosure standards for enterprises and further standardize ESG information disclosure work in China's industry.