Abstract: The microstructure and creep property before and after creep of three high chromium ferric steels with 0wt%Cu, 0.6wt%Cu and 3wt%Cu were studied under the conditions of 650 ℃ and 140 MPa. The results show that the creep fracture time increasing from 1 172 h to 1 620 h and the creep rate decreased from 2.2×10-9 s-1 to 1.2×10-9 s-1 with the Cu content increasing from 0wt% to 3wt%. The addition of Cu effectively suppressed forming high temperature δ-ferrite phase adverse to the creep property.Numerous Cu-rich phases with the size of 50-100 nm dispersedly precipitated in the matrix of the tested steel with 3wt%Cu, which could effectively restrain the motion of dislocation and thus increase the creep resistance of the steel.