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The techno-economic analysis is vital for the large-scale industrialization of a particular potential amine solvent. This paper proposes a techno-economic evaluation method to assess amine-based CO2 capture processes rapidly. The method’s validity is verified by using the DEEA-HMDA blend as an example. The DEEA-HDMA blend was also compared with various conventional amine solutions in terms of the CO2 solubility, KGav, reaction heat technical indicators and its corresponding economic indicators. Operating expenditure (OPEX) included both solvent consumption and energy requirements, and capital expenditure (CAPEX) was mainly for packed column construction. CAPEX (0.989 MUSD/tCO2) and OPEX (0.196 MUSD/tCO2) of using DEEA-HMDA as a CO2 absorbent were lower than MEA solutions with percentages of 23.3% and 1.2%, respectively. In conclusion, using the techno-economic method proposed in this paper for the economic evaluation of seven amine solvents shows that DEEA-HMDA is a potential carbon capture alternative solvent.