To　realize　efficient　manufacturing　and　quick　assembling　of　the　arc-shaped　aeronautic　structural　component　with　large　scale,　a　hybrid　flexible　manufacturing　system　consisting　of　a　double　circumferential　guideway　and　two　parallel　kinematic　machine　(PKM)　modules　is　proposed.　A　conceptual　design　of　the　flexible　manufacturing　system　is　carried　out　with　the　virtual　prototype　technology,　a　kinematic　model　is　established　to　conduct　an　inverse　kinematic　description,　and　the　singularity　of　the　PKM　is　analyzed.　Then　the　reachable　workspace　of　the　system　is　predicted　by　using　a　＇sliced　partition＇　searching　algorithm,　and　an　elasto-static　model　is　developed　to　calculate　the　gravity-caused　elastic　displacements　of　the　system　by　the　substructure　synthesis　technique.　The　results　are　validated　by　numerical　simulations　on　ANSYS　Workbench.　An　index　of　average　displacement　is　suggested　to　evaluate　the　influence　of　configuration　parameter　on　the　system　elasto-static　performance　throughout　the　entire　reachable　workspace.　The　investigations　manifest　that　the　flexible　manufacturing　system　claims　the　merits　of　a　large　workspace　generated　by　the　serial　mechanism　and　high　rigidity　and　loading　capacity　coming　from　the　PKM　module.　The　gravity-caused　structural　deformations　must　be　paid　enough　attentions　during　the　design　stage　of　the　flexible　manufacturing　system.　Additionally,　to　facilitate　its　applications,　the　designers　must　enhance　the　bending　resistance　along　x-direction　and　torsion　resistance　about　y-direction　of　the　hybrid　flexible　manufacturing　system.　©　2019,　Editorial　Office　of　Journal　of　Xi＇an　Jiaotong　University.　All　right　reserved.