Abstract: Space radiation model uncertainties may have important influence on the evaluation of anti-electrostatic property of thermal control materials.The sources of space radiation model uncertainties are analyzed and the uncertainty factor is defined firstly，then the simulation test was performed on the surface resistivity of ITO/Kapton/Al film in electron or proton radiation environments.After that，the influence of space radiation model uncertainties on the surface resistivity of ITO/Kapton/Al film was analyzed.As the increase of irradiation fluence，the influence of space radiation model uncertainties on the surface resisitivity increases firstly and then decrease until it can be ignored.The influence of space radiation model uncertainties on surface resisitivity of ITO/Kapton/Al film increases with the uncertainty factor.When the uncertainty factor lower than 1，the error from space radiation model uncertainty to surface resisitivity of ITO/Kapton/Al film is positive，while the uncertainty factor larger than 1，the error is negative.