A kind of bilayer setline, including a core wire and a tubular metal spring ring, the tubular metal spring ring is around the periphery for covering what core wire. Core wire is protected not bitten broken by the tooth of fish according to tubular metal spring ring. And core wire and tubular metal circle all have splendid pliability, unexpected curved folding is formed and is entangled with.一種雙層釣魚線，包括一芯線與一管狀金屬彈簧圈，該管狀金屬彈簧圈繞覆於芯線的外周。依管狀金屬彈簧圈保護芯線不被魚類的牙齒咬斷。且芯線與管狀金屬圈皆具有極佳的可撓性，不虞彎摺定型及糾結。
