The invention discloses a disposable infusion device. The infusion device includes an infusion catheter, a dropping hopper, an anti-bubble liquid dropping device, a dropper body, a liquid inlet hole,a dropper body fixing base, a dropper body connecting catheter, a vent hole, an air inlet plug, a liquid inlet pipe, a liquid inlet needle, an air pressure balancing needle, a balancing pipe and a heavy ion microporous film; the integral anti-bubble liquid dropping device is composed of the dropper body above, the dropper body fixing base in the middle, the dropper body connecting catheter below and the heavy ion microporous film fixed into the dropper body connecting catheter; by additionally arranging the heavy ion microporous film, after infusion is finished, partial medicinal liquid can remain on the heavy iron microporous film, blood reflux caused by complete dropping of the medicinal liquid is avoided, and liquid stopping is achieved at the same time; the infusion catheter and the dropping hopper adopt modified polyvinyl chloride as a raw material, not only is the physical mechanical performance of a traditional polyvinyl chloride material preserved, but also complete degradationis achieved, pollution is not caused to the environment, and environmental protection is facilitated. Moreover, since DEHP and other toxic additives are not added during preparation, important indicators such as heavy metal content and cytotoxicity are all superior to those of congeneric polyvinyl chloride products, and the infusion device is much safer to use.