Abstract: Eleven kinds of components in the space station application are selected to investigate the mould sensitivity, and the possible influence of the mould on the components. According to the specific mould environment in space stations, the accelerated testing is designed and carried out. The grades of the mould sensitivity are determined based on the damage extent of the mould in the components, and the experimental results are discussed. The result of sensitivity for the components in the mould environment and their sensitive parts may serve as a reference for improving the quality assurance of the components used in space stations.