Abstract: On the space charged particle irradiation test-bed, an irradiation experiment on the external surface of MLI used for remote-sensing spacecraft in sun-synchronous orbit is carried out, to investigate the charging & discharging effects and the change of morphology of the general Kapton/Al film in contrast to its conductive counterpart with ITO after the charged particle irradiation. It is shown that the conductive Kapton/Al surface with ITO exhibits little surface potential difference, and there is no discharge damage observed. Thus, the conductive Kapton/Al film is more appropriate to be used as the thermal control coating of spacecraft than the general Kapton/Al film.