Skin mesoderm injection needle

The utility model relates to the technical field of plastic equipment, in particular to a skin mesoderm injection needle, which comprises a needle head unit, a needle head unit and a needle head unit, the needle head unit comprises a needle seat and a baffle ring, the needle seat is provided with a plurality of micro-needles, and the baffle ring is arranged on the needle seat and positioned on the outer side of an annular sliding chute of the needle seat; the needle cylinder unit is connected with the injection cavity of the needle seat so as to convey injection liquid into the needle seat and inject the injection liquid through a plurality of microneedles; the protection unit comprises a protection sleeve and a protection bottom cover, one end of the protection sleeve is in threaded fit with the baffle ring, the protection bottom cover is arranged at the other end of the protection sleeve, and the protection sleeve can be stored in the annular sliding groove of the needle base; and the protective bottom cove