Disclosed is a catcher (100), comprising an catching ring (11) and at least one connecting rod (15), wherein both ends of the connecting rod (15) are connected to the catching ring (11), and the connecting line between the two ends of the connecting rod (15) is located within the catching ring (11). Compared with catching loops in the prior art, the catching ring (11) of the catcher (100) is a ring structure supported by the connecting rod (15), thereby having a relatively high stability and not easily being deformed under erosion by a blood flow, so as to facilitate accurate positioning by a doctor during clinical operations and improve the success rate of withdrawal.
