As　a　new　structural　material,　FRP　(fiber　reinforced　plastics)　features　light　weight,　high　strength,　corrosion　resistance,　anti-fatigue,　etc.,　and　have　a　bright　future　when　used　as　a　new　type　of　prestressing　tendon　in　engineering　structures.　The　horizontal　shear　strength　of　FRP　tendon　is　low,　which　will　affect　the　shear　strength　of　concrete　beams　prestressed　with　FRP　tendons.　Based　on　experimental　studies　on　27　concrete　beams　prestressed　with　CFRP　tendons,　this　paper　studied　the　shear　failure　modes　and　a　variety　of　parameters　on　shear　strength,　and　compared　the　shear　performance　with　concrete　beams　prestressed　with　steel　strands.　Studies　show　that　there　are　two　shear　failure　modes　for　concrete　beams　prestressed　with　FRP　tendons,　i.e.　diagonal　compression　and　shear-compression.　Shear　span　ratio　and　stirrup　rate　are　main　factors　influencing　the　shear　behavior　of　concrete　beams　prestressed　with　CFRP　tendons.　The　shear　strength　of　concrete　beams　prestressed　with　bonded　CFRP　tendons　is　about　15%　larger　than　that　of　concrete　beams　prestressed　with　unbonded　CFRP　tendons.　A　simple　formula　for　computing　the　shear　capacity　of　concrete　beams　prestressed　with　FRP　tendons　was　presented　by　introducing　two　parameters,　which　reflected　the　type　and　bonding　condition　of　prestressing　tendons　respectively.　The　computed　shear　capacities　of　concrete　beams　by　presented　formula　agree　well　with　the　experimental　data.