The application discloses a cosmetic needle assembling mechanism, which comprises a rack, a first feeding mechanism arranged on the rack, a needle pulling mechanism arranged on one side of the first feeding mechanism, a
bottle body conveying mechanism arranged on one side of the needle pulling mechanism, a needle tip detection mechanism arranged on the other side of the needle pulling mechanism, a
rotating disc assembly arranged on one side of the needle tip detection mechanism, a first clamping jaw mechanism arranged on the
rotating disc assembly in a circumferential direction, a threading mechanism, a
sponge threading mechanism, a stirring mechanism for stirring the needle head wire, a detection mechanism for detecting the needle cover
assembly, which are sequentially arranged on the
rotating disc assembly in a circumferential direction, and a cover inserting assembly arranged at the
tail end of the
bottle body conveying mechanism. The first feeding mechanism, the needle pulling mechanism, the
bottle body conveying mechanism, the needle tip detection mechanism, the rotating
disc assembly, the threading mechanism, the
sponge threading mechanism, the stirring mechanism, the detection mechanism and the cover inserting assembly are integrated on the rack, so that the automatic process of the cosmetic needle assembling is realized.