A cardiac valve delivery catheter, comprising an outer tube assembly and an inner tube assembly, wherein the outer tube assembly comprises a stent segment sheath configured to accommodate a valve and a delivery segment outer tube connected to a proximal end of the stent segment sheath; the inner tube assembly is disposed in a cavity of the outer tube assembly, and the inner tube assembly is axially movable relative to the outer tube assembly; and the delivery segment outer tube comprises a polymer tube and a hollow tubular structure disposed in the polymer tube; wherein the hollow tubular structure is cut from a metal tube, and the hollow tubular structure comprises a plurality of hollow portions arranged in an axially spaced manner and connection portions each formed between two adjacent ones of the plurality of hollow portions; an even number of connecting ribs and an even number of hollow slots are arranged on each hollow portion in a circumferential direction of the hollow portion; each of the connecting ribs is disposed between two of the plurality of hollow slots; and the connecting ribs are configured to connect two axially adjacent ones of the connection portions; wherein each of the hollow slots is W-shaped; each of the hollow portions further comprises a clamping piece and a retaining groove which are disposed along the circumferential direction; the retaining groove is a part of a corresponding one of the hollow slots; the clamping piece and the retaining groove are located on a midperpendicular of a line connecting two adjacent ones of the connecting ribs; the clamping piece is limited in the retaining groove in the circumferential direction of the hollow portion; and when adjacent ones of the connection portions perform relative rotation, the clamping piece moves relative to the limiting groove and has a limiting position; wherein lines (W1, W2) each connecting two opposite connecting ribs on a respective one of the hollow portions at two ends of each one of the connection portions have projections intersecting each other on a cross section of the connection portion; wherein distances between projections of axially adjacent connecting ribs on a same vertical projection plane are equal, and lines connecting the plurality of connecting ribs that are distributed axially are spiral. wherein the hollow tubular structure is cut from a metal tube, and the hollow tubular structure comprises a plurality of hollow portions arranged in an axially spaced manner and connection portions each formed between two adjacent ones of the plurality of hollow portions; an even number of connecting ribs and an even number of hollow slots are arranged on each hollow portion in a circumferential direction of the hollow portion; each of the connecting ribs is disposed between two of the plurality of hollow slots; and the connecting ribs are configured to connect two axially adjacent ones of the connection portions; wherein each of the hollow slots is W-shaped; each of the hollow portions further comprises a clamping piece and a retaining groove which are disposed along the circumferential direction; the retaining groove is a part of a corresponding one of the hollow slots; the clamping piece and the retaining groove are located on a midperpendicular of a line connecting two adjacent ones of the connecting ribs; the clamping piece is limited in the retaining groove in the circumferential direction of the hollow portion; and when adjacent ones of the connection portions perform relative rotation, the clamping piece moves relative to the limiting groove and has a limiting position; wherein lines (W1, W2) each connecting two opposite connecting ribs on a respective one of the hollow portions at two ends of each one of the connection portions have projections intersecting each other on a cross section of the connection portion; wherein distances between projections of axially adjacent connecting ribs on a same vertical projection plane are equal, and lines connecting the plurality of connecting ribs that are distributed axially are spiral.