Pressing and holding device for pre-installing interventional instrument, interventional instrument conveying assembly and packaging assembly

The invention discloses a pressing and holding device for preassembling an interventional instrument, an interventional instrument conveying assembly and a packaging assembly.The interventional instrument conveying assembly is provided with a far end and a near end which are opposite and is used for locking or releasing a traction line of the interventional instrument in a drive-by-wire mode, and the interventional instrument conveying assembly comprises a lock seat, a pressing plate, a pressing plate and a pressing plate, the locking pieces are located on the far-end side of the locking seat, the locking pieces are rod-shaped, each locking piece is connected to a mounting seat, each locking piece further extends towards the near-end side from the mounting seat, each locking piece is provided with a locking position combined with the corresponding locking hole and an unlocking position separated from the corresponding locking hole, and the unlocking positions are located below the locking positions. The tract