In order to objectively evaluate the low-carbon ecological construction effect of mines and promote the coordinated development of economic construction and environmental protection of mining enterprises, an evaluation index system for the low-carbon ecological construction effect of mines was established based on the idea of DPSIR, and the index weight algorithm of DPSIR-DEMATEL-AHP was constructed by using the DEMATEL method and AHP method to objectively revealed the close degree connection among the driving force of mining enterprise development, ecological environment pressure, environmental quality status of mining areas, the impact of mining on the environment and the response of mining enterprises, also better quantitatively describes the ambiguity and uncertainty of the subjective opinions of the expert group on the relative importance of each indicator. Using the interval number distance algorithm and the binary connection number optimal algorithm, a method for evaluating the effect of mine low-carbon ecological construction based on interval number goodness is established, which provides an effective method for objectively evaluating the low-carbon ecological construction effect of mine and analyzing the key factors affecting mine low-carbon ecological construction. The model method was used to evaluate the low-carbon ecological construction effect of open-pit mine and analyze its key influencing factors. The results showed that the low-carbon ecological construction effect of the mine in 2021 was the best while the low-carbon ecological construction effect in 2020 was the worst. Important measures to improve the effectiveness of low-carbon ecological construction in mines include enhancing the mining profit margin, saving energy and increasing efficiency in mines and reducing the CO2 emissions, enhancing the solid waste utilization per unit of industrial output value, increasing the greening coverage rate in mining, implementing effective dust-reducing measures, strengthening the management of key work processes in mine production, and enhancing the coverage rate of energy-saving and emission-reduction campaigns and training and so on.