Interventional instrument conveying system capable of adjusting bending of pipe fitting

The interventional instrument conveying system comprises a plurality of pipe fittings and a control handle for driving the pipe fittings to move relatively, and the pipe fittings are driven to move relatively at the position of the control handle in a hydraulic mode; the control handle is provided with at least two hydraulic cavities, pistons are slidably mounted in the hydraulic cavities respectively, the multiple pipe fittings comprise the first pipe fitting, the middle pipe fitting and the second pipe fitting which are sequentially arranged from inside to outside, and every two adjacent pipe fittings in the radial direction comprise the outer-layer pipe fitting and the inner-layer pipe fitting. The outer-layer pipe fitting enters one hydraulic cavity and is fixed with a piston in the hydraulic cavity, and the inner-layer pipe fitting extends to be connected to pistons of other hydraulic cavities or is fixed on a control handle; the far end of the first pipe fitting is used for placing an interventional ins