Remaining needle heparin cap protection device

The utility model discloses a protective device for a heparin cap of an indwelling needle. The device comprises an isolation sleeve, one end of the isolation sleeve is closed, the other end of the isolation sleeve is provided with a sleeve inlet, a detachable protective film is arranged in the sleeve inlet, the protective film is formed by stacking a plurality of plastic films, the heparin cap is detachably and tightly sleeved with the isolation sleeve through the sleeve inlet, and the protective film is tightly attached to the end of the heparin cap. After a conventional indwelling needle is sealed, the isolation sleeve can be sleeved on the indwelling needle, so that the soft rubber surface of the heparin cap of the indwelling needle can be well protected, the breeding of dirt and bacteria caused by long-term exposure in the outside air is prevented, and the bacterial infection of the blood of a patient is prevented; the protective film is arranged in the isolation sleeve, a plastic film, possibly polluted,