The invention relates to a micro plasma pen for removing freckles on skin, and comprises a plasma skin cleaning head, a handle shell, a micro transducer arranged in the shell, a power output controller and a power module. The pen is characterized in that: a high and variable frequency plasma power occurrence circuit made of an integrated circuit chip or a semiconductor microprocessor MCU is installed in the shell; and in a loop, a circuit connection is formed by a medium and high frequency output magnetic core transformer or a ceramic piezoelectric type medium and high frequency transformer. Since the mini plasma pen for removing the freckles on the skin has a small size, a long service life and extremely low cost, the pen has the advantages of no pain when put into use, a self-sterilizing function, capability of being used as a tool for personal beautifying like nail clippers and small blades, a large social demand of nearly for anyone, and capability of replacing a carbon dioxide laser epidermal freckle removing machine in a hospital on a plurality of occasions.