Regarding cutting balloons and balloon catheters. The cutting balloon includes a balloon body 3 and a cutting wire 5 arranged in the radial direction along the outer surface of the balloon body, both ends of the cutting wire are fixed to both ends of the balloon body, and the cutting wire includes a folding configuration. .. The surface of the cutting balloon is provided with a flexible cutting wire, which has excellent permeability and can incise the plaque tissue when expanded, causing less damage to the intima and at the same time the cutting wire is fixed to the surface of the cutting balloon. Being or sliding along the telescopic direction to avoid the problem of displacement or entanglement during the cutting process. The folding configuration compensates the cutting wire for axial length as the balloon expands, increasing the frictional force between the balloon body and the vessel wall and preventing displacement of the balloon. [Selection diagram] Fig. 5
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