FRP (fiber reinforced plastic) connection piece and prefabricated concrete sandwich wall

The invention discloses an FRP (fiber reinforced plastic) connection piece. The FRP connection piece comprise an FRP connection rib and an FRP flange, wherein two ends of the FRP connection rib are respectively and fixedly connected with the FRP flange in detachable mode. The FRP connection piece has the advantages of being large in tensile strength, small in heat conductivity coefficient, good in thermal insulation effect, good in corrosion and fatigue resistance performance and the like. The invention further provides a prefabricated concrete sandwich wall. The FRP connection piece is respectively fixed together with an inner wallboard and an outer wallboard in anchoring mode, and thereby effectively avoids cold/hot bridge effects generated when a common connection piece is used to connect the prefabricated concrete sandwich wall, and greatly improves thermal insulation effects and security of the prefabricated concrete sandwich wall.