A kind of dual-arm supporting frame structure,On a dykes and dams in system setting what Yi Yu Ponds,The dykes and dams have a upper surface,And the dual-arm supporting frame structure include a setting what upper surface fixing layer,Steel structure and two coverings among plural item setting what fixing layer,Those steel structures respectively have two to extend towards opposite sides,And the elongated end on one of position what Yu Ponds water surface,Two covering covers on those elongated ends of what,By those elongated ends and two covering collocation are used,The upper surface of dykes and dams can be expanded,Increase usable floor area,If two covering is hardboard material,Working space can be increased or can be set between small instruments and tools,Between having a rest etc.,The shaded side that fishes and shrimps hide sunlight can be then provided if sunshade net,Prevent fishes and shrimps Yin Taire and sudden death is dead.一種雙臂型支撐架體結構，係設置於一魚塭內的一堤壩上，該堤壩具有一上表面，而該雙臂型支撐架體結構包括有一設置於該上表面的固定層、複數條設置於該固定層之中的鋼構以及二覆蓋件，該些鋼構各具有二朝相對兩側延伸，並位於該魚塭之一水面上的延伸端，該二覆蓋件覆蓋於該些延伸端上，藉由將該些延伸端與該二覆蓋件搭配使用，可以擴大堤壩的上表面，增加使用面積，若該二覆蓋件為硬板材，可以增加作業空間或可以設置小型工具間、休憩間等，若為遮陽網則可以提供魚蝦躲陽光的陰影處，防止魚蝦因太熱而暴斃死亡。
