Abstract: The present invention relates to a method for controlling a mobile phone loss prevention function by means of Bluetooth earphones. The method includes: a link loss determination step (S10) of measuring a sensitivity of a signal transmitted/received between a mobile phone and the Bluetooth earphone and determining occurrence of a link loss; warning sound generation steps (S20, S40, and S60) of, when the link loss has occurred, generating a warning sound, which warns of loss of the mobile phone, through the Bluetooth earphone in such a manner as to amplify a volume of the warning sound from a low volume to a high volume for each step; and warning sound stop identification steps (S30, S50, and S70) of determining whether a warning sound stop button has been operated by a user who has recognized the warning sound and selecting whether the generation of the warning sound is to be stopped.