The invention discloses an electric breast pump muting method, which is applied to an electric breast pump. The electric breast pump comprises a mute button, a control assembly, a voltage module, a negative pressure pump and a breast pump; the method comprises the steps of receiving, by the mute button, a trigger to send a mute signal; receiving, by the control assembly, the mute signal to call afirst mute voltage from the voltage module, and set the input voltage of the negative pressure pump to the first mute voltage, wherein the first mute voltage is less than the input voltage of the negative pressure pump in a breast pumping mode. When the input voltage of the negative pressure pump is lowered, the working intensity of the electric breast pump is weakened, so that the noise of the electric breast pump is weakened, and the electric breast pump is in a mute working mode. In addition, in order to ensure that the amount of breast pumping of the electric breast pump in the mute mode is not less than the amount of breast pumping in the breast pumping mode, the invention creatively extends the time of single breast pumping, thereby ensuring that the electric breast pump can still work efficiently in the mute mode. The invention also discloses the electric breast pump.