The invention discloses an FRP bar prestressed stretching and anchoring device. The stretching and anchoring device comprises an anchoring device used for anchoring an FRP bar and a stretching device used for stretching the FRP bar, wherein the anchoring device comprises an anchoring frame, a sleeve and a limit component; the anchoring frame is fixedly connected in an anchoring area at the end ofa component to be reinforced; the sleeve penetrates on the anchoring frame and is used for anchoring the FRP bar; the limit component is connected with the sleeve and is used for limiting the sleeve after stretching the FRP bar; and the stretching device comprises force application equipment and a soft cable, wherein the force application equipment is connected with the sleeve through the soft cable and is used for applying a traction force for stretching the FRP bar. By using the device, the FRP bar can be simply and conveniently stretched and anchored after being stretched.