Bortezomib freeze-dried composition and preparation method thereof

The invention belongs to the field of medicine and provides a bortezomib freeze-dried composition and a preparation method thereof. The bortezomib freeze-dried composition is a freeze-dried composition which is obtained through the steps of spraying the mixed solution of bortezomib, mannitol and tertiary butanol into liquid nitrogen to form frozen microparticles, dissolving the microparticles in water for injection, and finally, performing freeze-drying. The bortezomib freeze-dried composition provided by the invention is better in quality and higher in stability.