Sterile vaccine inoculator

The utility model discloses a sterile vaccine inoculator which comprises a sleeve, and a needle head is fixedly connected to the end of the sleeve. When the vaccination cap is used, a vaccine to be inoculated is prepared firstly, when a patient is disinfected and inoculated, the push rod is drawn firstly to enable negative pressure to be formed in the sleeve to suck the vaccine into the sleeve, then the sleeve is held to enable the cap body to face downwards, then the protective paste is torn off firstly, and then the sealing paste is torn off; air enters the cavity from the air holes, the atmospheric pressure in the cavity is the same as that of the outside, meanwhile, under the action of gravity, iodophor liquid in the cavity enters the notch through the communicating opening and is absorbed by the aseptic cotton, and then medical staff can directly align the bottom of the cap body to an inoculation point of an inoculation staff. The disinfection cotton adhered with the iodophor liquid is used for wiping an