A negative 
ion generator is provided in the invention. The negative 
ion generating module is located in the inside of the insulating housing, the power supply input wire is connected with the negativeion generating module through the insulating housing, a supply power is provided for the negative 
ion generation module, the negative ion generating module is fixed with the negative ion output carbon 
brush, the negative ion output carbon 
brush outputs the depressurized negative ion to the outside, the negative ion generating module and the space between the negative ion output carbon 
brush and the inside of the insulating shell are filled with insulating gas, so that the 10,000-
volt high voltage is reduced to a kilovolt or even a hundred volts, as the negative 
ion emission distance is enhance under the static state, the negative 
ion emission distance is fully combined with the 
oxygen molecule in the air, a large amount of negative 
oxygen ions beneficial to the 
human body are generated, and the negative 
oxygen ions play the roles of reducing pressure and enhancing activity.