Abstract: The preparation process of two paints—956 grey paint and 956green paint is briefly discussed in this artiele.The two paints conduction cha-racteristics and thier change regularities in the simulated space vacuum,ele-ctron irradiation and solar irradiation have been studied.Therefore,thecharging states of these paints surfaces on orbit can be predicted by theexperimental results.In addition,the possibility of using these paints onhigh orbit can also be expected.