In order to enhance the practical and operational performance,a method based on PCA-LINMAP-FCE for maintainability evaluation is proposed.Combining PCA-LINMAP with fuzzy comprehensive evaluation,the provided approach evaluates the maintainability quantitatively and qualitatively on the basis of a simplified evaluation index system.Experimental results show that this high operational method reduces the arbitrary of subjective evaluation effectively.It is useful for maintenance personnel and designer to get acquainted with influencing factors of maintainability,and supply decision-making information for scientific design and implementation of maintaining scheme.