The hot deformation behavior of Al-0.04Er-0.08Zr alloy was investigated by hot compression tests in the temperature range from 200°C to 450°C. True stress-true strain curves were analyzed by linear fitting using Arrhenius-type equation, and deformation microstructure was studied by TEM. The results indicate that dynamic recovery is the dominated softening mechanism for both the solutionized and the aged sample during hot compression. Hot deformation especially at high temperature and low strain rate induced rapid precipitation in the solutionized samples. Dynamic precipitation apparently led to the increase of the flow stress of the solutionized samples during hot compression process, but did not effectively enhance the microhardness of the deformed samples. The dynamic precipitation also led to deviations of the Arrhenius-type fitting of the stress-strain curves.