Abstract: The research of nano-drug-loaded carrier has made fast progress as potential drug delivery systems. Nano-drugs possess several advantages including delivering drug targeting, releasing drug progressively, prolonging administering time, decreasing the effect of toxicity and so on. So as a new drug carrier, nanoparticles appear to be very promising. In this paper, kinds of the nanoparticle drug delivery system and application of nanotechnology in intravenous medicine study are introduced.