The invention discloses a health-management-based earphone volume control method. The method comprises the following steps that: S1, a vibrating sensor collects a body heartbeat frequency, converts the frequency into an electric signal, and then transmits the signal to a controller; S2, the controller receives and determines whether the electric signal is lower than a preset value N1; if so, a step S31 is carried out; and if not, a step S32 is carried out; S31, the controller starts a sleep mode and reduces a current I received by an earphone sounding unit according to the value of the electric signal, thereby reducing the volume of the earphone; and S32, the controller keeps the current I received by the earphone sounding unit to be unchanged and thus the earphone volume is not changed, so that the earphone volume can be adjusted conveniently according to the user state. In addition, the invention also provides an earphone containing an earphone receiver, an audio cable, an earphone plug, a vibration sensor collecting a heartbeat frequency, and a controller adjusting the earphone volume. The earphone volume can be adjusted according to the change of the heartbeat frequency, so that the sleep quality of the user can be improved.