The　dynamics　of　redundant　flexible　cooperative　robots　is　analyzed　for　the　first　time　in　this　paper.　Based　on　the　kinematic　and　dynamic　coordinated　constraints,　the　dynamic　model　of　two　4R　redundant　flexible　robots　cooperating　a　rigid　payload　is　developed　by　using　Finite　Element　Method　and　Lagrange　equation　at　first.　The　dynamics　of　the　redundant　flexible　cooperative　system　is　analyzed　subsequently.