With　the　advances　of　outsourced　computation,　the　threats　of　data　leakage　and　loss　of　computational　accuracy　over　rational　domain　are　attracting　increasing　concerns.　In　this　paper,　we　propose　a　framework　for　Privacy-preserving　Data　Sharing　and　high-accurate　outsourced　Computation　system,　referred　as　PDSC.　PDSC　system　can　perform　secure　data　sharing　with　multiple　data　providers.　Besides,　the　original　data　and　computed　results　in　the　rational　field　can　be　securely　processed　and　stored　in　the　cloud　without　privacy　leakage.　Specifically,　we　design　privacy-preserving　computation　protocols　over　rational　numbers　to　guarantee　computational　accuracy　and　handle　outsourced　operations　on-the-fly.　Detailed　security　analysis　and　experimental　results　demonstrate　that　PDSC　system　is　secure　and　feasible,　respectively.