Transdermal drug delivery auxiliary device

The utility model discloses a transdermal drug delivery auxiliary device, which comprises a handle, a transdermal drug delivery device and a transdermal drug delivery device, the protective shell is rotationally connected to the lower end of the handle, and a plurality of needle outlet holes are formed in the lower bottom surface of the protective shell; the needle outlet assembly comprises an adjusting part and a main body part, the main body part slides up and down in the inner cavity of the protective shell without relative rotation, the main body part is provided with a plurality of microneedles extending downwards, the microneedles and the needle outlet holes are arranged in a one-to-one correspondence mode, and the adjusting part is connected to the main body part and extends upwards into the spiral sliding groove; the adjusting part is provided with a spiral sliding block in spiral connection with the spiral sliding groove. When the handle rotates relative to the protective shell, the spiral sliding gr