The invention relates to a method for a hand-free mobile phone conversation of a mobile terminal. The method comprises the following steps of displaying a visible prompt for a user to trigger microphone switching or generating a microphone switching command when two preset switching conditions are both met, wherein one switching condition is that the call state of the mobile terminal is a hand-free state, and the other switching condition is that a pair of earphones is inserted into an earphone seat of the mobile terminal; if the visible prompt is displayed, detecting a trigger operation which is executed by the user according to the visible prompt, and switching the microphone of the pair of earphones to a transmitting microphone used for the hand-free mobile phone conversation after the trigger operation is detected; and if the microphone switching command is generated, switching the microphone of the pair of earphones to the transmitting microphone used for the hand-free mobile phone conversation. By adopting the scheme of the invention, when the microphone of the mobile terminal goes wrong, a hand-free mobile phone conversation effect of the mobile terminal can be still kept.