A ball valve comprising a valve body structure and a driving structure, the valve body structure comprising a valve body and a sealing component of a valve, the valve body being provided with a valve port, the sealing component of the valve being installed in the valve body and capable of opening or sealing the valve port, and at least a part of the driving structure being capable of extending into the valve body and being connected to the sealing component of the valve to drive the sealing component of the valve to move in the valve body, the valve body structure further comprises a sealing member, which is surrounding the valve port and configured to cooperate with the sealing component of the valve to seal the valve port, wherein a longitudinal cross section of the sealing member is in a shape of any one of a convex polygon, an ellipse, a circle, a D-shape, or a waist shape; the sealing component of the valve comprises a rotating body and a sealing structure made of a metal material, the rotating body comprises a flow-through surface and a sealing surface which are adjacent, an angle is defined between the flow-through surface and the sealing surface, and a flow-guiding hole is located in the flow-through surface for a medium to flow through, and the sealing structure is installed on the sealing surface and capable of sealing the valve port with a rotation of the rotating body; characterized in that, the sealing structure comprises: a sealing plate configured for sealing the valve port; and a connecting column disposed on a side surface of the sealing plate, wherein a part of the sealing surface depressing is defined as a fitting hole, and the connecting column is capable of inserting into the fitting hole, enabling the sealing structure to be installed on the sealing surface; an inner side of the sealing surface is provided with a buckling portion surrounding a circumference of the fitting hole and protruding along an axis of the fitting hole, and a clamping slot is located on the connecting column; after the connecting column inserts into the fitting hole, the buckling portion is capable of clamping into the clamping slot; and the inner side of the sealing surface is provided with a plurality of buckling portions, and the plurality of buckling portions are separated from each other in a circumference of the fitting hole. the valve body structure further comprises a sealing member, which is surrounding the valve port and configured to cooperate with the sealing component of the valve to seal the valve port, wherein a longitudinal cross section of the sealing member is in a shape of any one of a convex polygon, an ellipse, a circle, a D-shape, or a waist shape; the sealing component of the valve comprises a rotating body and a sealing structure made of a metal material, the rotating body comprises a flow-through surface and a sealing surface which are adjacent, an angle is defined between the flow-through surface and the sealing surface, and a flow-guiding hole is located in the flow-through surface for a medium to flow through, and the sealing structure is installed on the sealing surface and capable of sealing the valve port with a rotation of the rotating body; characterized in that, the sealing structure comprises: a sealing plate configured for sealing the valve port; and a connecting column disposed on a side surface of the sealing plate, wherein a part of the sealing surface depressing is defined as a fitting hole, and the connecting column is capable of inserting into the fitting hole, enabling the sealing structure to be installed on the sealing surface; an inner side of the sealing surface is provided with a buckling portion surrounding a circumference of the fitting hole and protruding along an axis of the fitting hole, and a clamping slot is located on the connecting column; after the connecting column inserts into the fitting hole, the buckling portion is capable of clamping into the clamping slot; and the inner side of the sealing surface is provided with a plurality of buckling portions, and the plurality of buckling portions are separated from each other in a circumference of the fitting hole. a sealing plate configured for sealing the valve port; and a connecting column disposed on a side surface of the sealing plate, wherein a part of the sealing surface depressing is defined as a fitting hole, and the connecting column is capable of inserting into the fitting hole, enabling the sealing structure to be installed on the sealing surface; an inner side of the sealing surface is provided with a buckling portion surrounding a circumference of the fitting hole and protruding along an axis of the fitting hole, and a clamping slot is located on the connecting column; after the connecting column inserts into the fitting hole, the buckling portion is capable of clamping into the clamping slot; and the inner side of the sealing surface is provided with a plurality of buckling portions, and the plurality of buckling portions are separated from each other in a circumference of the fitting hole.