Plasma treatment device with variable treatment part area

The invention relates to a plasma treatment device with a variable treatment part area, which comprises a shell, a driving piece, a driven piece, a treatment part, a spring and an end cover, and is characterized in that the treatment part is at least partially made of memory metal and has a restrained state and a free state, when the treatment part does not extend out of the shell, the treatment part is in the restrained state, and when the treatment part does not extend out of the shell, the treatment part is in the free state; when the treatment part does not extend out of the shell, the treatment part is in a free state, and the near end of the treatment part is fixed to the far end of the driven part. According to the plasma treatment device, the area of the treatment part of the plasma treatment device is changed by using the memory metal, and the form of the treatment part can be changed along with the change of the treatment scene so as to meet the treatment requirements under different conditions. 本申请