Bone filling bag with nonuniform aperture

The invention provides a bone filling bag with a nonuniform aperture. The bone filling bag comprises an implantation member, wherein the implantation member comprises a filling opening and an accommodation portion, the accommodation portion is composed of one or a plurality of flexible non-airtight enclosing walls with a plurality of through holes, and the implantation member is reduced and imbedded into a bone tissue; and a slurry-form medical material which is injected into and fills the accommodation portion via the filling opening, is solidified after the enclosing walls pushing the accommodation portion is expanded, and is fixedly connected with the bone tissue, wherein after the accommodation portion is expanded, the front-end area and the rear-end area of the accommodation portion are uniformly provided with a plurality of first through holes, an intermediate area disposed between the front-end area and the rear-end area is provided with a plurality of second through holes and third through holes, the second through holes and the third through holes are alternatively distributed at intervals, and the apertures of the second through holes are larger than the apertures of the third through holes. According to the invention, while it is ensured that the problem of seepage during bone cement perfusion is firstly solved, through setting the size and the arrangement mode of the through holes in the enclosing walls of the implantation member, the risks of secondary fractures after an operation are greatly reduced.