The invention discloses a mobile terminal with a calling misoperation preventive function. The mobile terminal comprises an earphone plug. A pin 1 of the earphone plug is connected with a microphone signal control end of the earphone plug, a pin 2 of the earphone plug is grounded, a pin 3 of the earphone plug is connected with a right-sound-track signal control end of the earphone plug, a pin 4 of the earphone plug is connected with a left-sound-track signal control end, a pin 5 of the earphone plug is connected with a signal blocking control end of the earphone plug, and a pin 6 of the earphone plug is grounded through a pull-down resistor. The pin 5 and the pin 6 are switch control pins of the earphone plug, and a pin 6 is provided with a metal spring piece arranged on one side of the pin 5. The metal spring piece and the pin 5 are disconnected to control an analog switch before an earphone is pulled out and microphone signal are in short-circuit connection with ground signals, so that the microphone signal control end and an earphone calling button sensing end are disconnected. The earphone calling button sensing end is kept in high level, and accordingly, an earphone receiving/hanging-off button cannot be triggered to send commands, and calling misoperation is avoided.