The thermal barrier coating prepared by atmospheric plasma spraying was modified by high-current pulsed electron beam. The original coating and the electron beam modified coating were subjected to CMAS corrosion experiments at 1250℃, respectively. The phase composition, microstructure and chemical composition of the original coating and the electron beam modified coating before and after corrosion were characterized by XRD, SEM and EDS, and the CMAS corrosion behaviors and influence laws of the original coating and the modified coating were compared and analyzed. The results show that the surface roughness of the modified coating decreases, and a dense remelting layer with columnar crystals is formed. The surface of the coating has better structural stability and phase stability. After 8 hours of CMAS corrosion, the structure of the modified coating remains intact, and the coating does not fail to fall off, so it has good resistance to CMAS corrosion.An experimental set-up was designed for measuring the self-field losses of Bi2223/Ag HTS tapes using a transport current method.