Aqueous monoethanolamine (MEA) is the mostly used absorbent for removing carbon dioxide (CO2) from fuel gas in the industry. Improving the performances of aqueous MEA is the key for the effective CO2 removal. The absorption, regeneration performances and corrosion properties of MEA and its four blends with polyamines (MEA/polyamines) at the same concentration are studied. The polyamines, including N-(2-hydroxyethyl) ethylenediamine (AEEA), piperazine (PZ), diethylenetriamine (DETA) and triethylenetetramine (TETA), are considered. The results show that the absorption and regeneration capacity of four kind blends of MEA/polyamine are much better than that of MEA when the content of polyamines are low. The corrosion rate of MEA/polyamine is low than that of MEA. However, with the increase of polyamines content in blends, the regeneration rates of the blends decrease. It is concluded that MEA/polyamine with suitable polyamine content is a high efficiency absorption solvent comparing with MEA. Among the four blends of MEA/polyamine, the performance of MEA/DETA and MEA/TETA are the best.