This creation is related to the structure of a multi-purpose anion air cleaner. It is designed to improve the versatility of the anion air cleaner and the inconvenience of increasing the number of negative ion emissions by touching the conductive switch by hand for a long time. For a negative ion air cleaner with a negative ion emission circuit and a soft negative ion emission terminal, a socket seat is provided on the back, and a conductive contact piece body communicating with the negative ion emission circuit is arranged in the socket seat, and the socket The seat can be inserted into a conductive clip seat or a placement seat that communicates with the conductive contact sheet body. When clamped, it can directly contact the human body and the ground, or contact the human body and the ground through a conductive chain rope; The air cleaner slot seat, insert sleeve holder or placement seat is matched with the conductive chain rope, and can be placed, attached to a mask, clothes, or hung on the neck or bracelet, and does not need to be pressed for a long time. Use natural contact to use the human body as a circuit to promote an increase in potential difference, and continuously increase the number of negative ion emissions for a long time without burden, in order to achieve multi-purpose and facilitate the practical creation of clean air .