Bending-adjustable guide catheter for arteries and veins of target organs of whole body

The catheter comprises a catheter body and an inner cavity flushing pipe, the inner cavity flushing pipe is fixedly connected and communicated with the catheter body, the end, close to the inner cavity flushing pipe, of the catheter body is a near end, and the end, away from the inner cavity flushing pipe, of the catheter body is a far end; the near end of the tube body is provided with a bending adjusting mechanism used for adjusting bending of the far end. When the catheter is used, firstly, the far end of the catheter body is inserted into a preset blood vessel, saline enters the catheter body through the inner cavity flushing pipe after the catheter is opened in an operation, the inner cavity of the catheter body is flushed, and the far end of the catheter body is adjusted through the bending adjusting mechanism according to the position of the catheter body in the blood vessel after radiography. The far end of the catheter body is bent according to the direction of the blood vessel, so that the far end o