Abstract: Effect of high-intensity magnetic field on the microstructure evolution and solubility of Fe in Cu matrix of Cu-20wt%Fe alloy after precipitation treatment was investigated. The results showed that the spheroidization of Fe-rich dendrites slightly intensifies and their distribution is more uniform with the increasing magnetic induction of the high-intensity magnetic field exerted to the alloy. Observation by high-power SEM indicated that the Fe atoms precipitated from Cu matrix increases with increasing magnetic induction, which reveals that the magnetic field can stimulate the precipitation of Fe from the oversaturated Cu matrix. The solubility of Cu matrix in the Cu-20wt%Fe alloy specimens after precipitation treatment in different high-intensity magnetic field was analyzed by EDS methods, and the results showed that the solubility of Fe is minimum when the intensity of magnetic field is 10T at 500°C during precipitation. This is because of the effect combining high-intensity magnetic field with precipitating temperature. The former reduces the activation energy due to Fe atomic diffusion to stimulate the precipitation of Fe atoms, and the latter induces the dissolution of Fe atoms due to atomic diffusion.