A mitral valve clamping device, comprising a clamp body(100) of the mitral valve clamping device, and a mitral valve repair device. The clamp body(100) may include a supporting part(110), a first inner clamp arm(120), a first outer clamp arm(140), a second inner clamp arm(130) and a second outer clamp arm(150). A first side of the supporting part(110) may be connected to the first inner clamp arm(120) and the first outer clamp arm(140) in sequence via a bendable connection, and a second side of the supporting part(110) may be connected to the second inner clamp arm(130) and the second outer clamp arm(150) in sequence via a bendable connection. A length of the first inner clamp arm(120) may be larger than a length of the second inner clamp arm(130). A length of the first outer clamp arm(140) may be larger than a length of the second outer clamp arm(150).
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