The utility model relates to the field of medical instruments, in particular to a biliary tract spiral particle support and support conveying catheter set which comprises a spiral particle support anda support conveying catheter. The spiral particle stent comprises a spiral stent woven mesh, a spiral top supporting layer and a spiral particle tube; the stent conveying catheter comprises an outersleeve, a middle sleeve, a guide sleeve, a catheter head sleeve, a catheter head and two top supporting assemblies. During use, particles are loaded into the particle bin; the spiral particle stent issleeved on the stent conveying catheter; the stent conveying catheter is introduced into the body of a patient, the distance between the two sets of jacking needles is close to each other through pushing of all the tubes of the stent conveying catheter to further compress the spiral particle stent, the length of the spiral particle stent is shortened to the minimum, and at the moment, the maximumcircumferential outer diameter of the spiral particle stent can jack the inner wall of the biliary tract. The spiral particle support is stably kept at the shortest length and the maximum outer diameter to stably support the inner wall of the biliary tract of a patient for particle radiotherapy, and is simple, convenient and practical.