A multifunctional vertebroplasty instrument, comprising a balloon assembly (1) and a cavity opening assembly (2)； the cavity opening assembly (2) comprises an outer tube assembly (21) and a cavity opening liner assembly (22)； the outer tube assembly (21) comprises an outer tube (211) and an outer tube handle (212)； the outer tube (211) has axial stiffness that enables said tube to withstand tissue cavity opening thrust without deformation； the outer tube handle (212) is provided with a bone filler injection port (2120)； the cavity opening liner assembly (22) comprises an end closure (221), a connecting member (222), and a connecting member handle (223)； the maximum outer diameter of the end enclosure (221) is less than or equal to the inner diameter of the outer tube (211)； the distal end portion of the balloon assembly (1) is inserted into the outer tube assembly (21) along the connecting member (222). The other multifunctional vertebroplasty instrument differs from the above multifunctional vertebroplasty instrument in that: the distal end of the outer tube (211) is provided with a side hole (2110), the cavity opening lining assembly (22) comprises an end enclosure (221) and a connecting member (222), and the maximum outer diameter of the end enclosure (221) is greater than the inner diameter of the outer tube (211). The two multifunctional vertebroplasty instruments implement the integration of cavity opening, expansion, and bone filler injection, and are easy and flexible to operate, thereby shortening the operation time and reducing the operation risk.L'invention concerne un instrument de vertébroplastie multifonctionnel, comprenant un ensemble ballonnet (1) et un ensemble ouverture de cavité (2) ； l'ensemble ouverture de cavité (2) comprend un ensemble tube externe (21) et un ensemble revêtement d'ouverture de cavité (22) ； l'ensemble tube externe (21) comprend un tube externe (211) et une poignée de tube externe (212) ； le tube externe (211) a une rigidité ax
