For　the　on-orbit　assembly　task　of　large　space　structures,　a　parallel　mechanism　driven　by　eight　cables　is　proposed,　which　has　the　characteristics　of　simple　structure,　light　weight　and　large　workspace;　for　the　design　of　the　configuration　of　the　cable-driven　parallel　mechanism,　the　correlation　matrix　of　the　the　outlet　points　and　connection　points　between　the　cable　and　the　central　actuator　is　defined,　on　the　basis　of　which　the　constraints　are　considered,　the　18　effective　configurations　of　the　cable-driven　parallel　mechanism　are　synthesized;　the　force-closure　workspace　and　the　feasible　wrench　workspace　of　different　configurations　are　calculated.　The　best　configuration　is　selected　based　on　the　volume　of　the　workspace;　the　effect　of　changing　the　cable　tension　and　the　position　of　the　connection　points　between　the　cables　and　the　central　actuator　on　the　feasible　wrench　workspace　of　the　mechanism　is　analyzed,　and　the　position　parameters　is　optimized.　©　2021　Journal　of　Mechanical　Engineering.