The invention provides a mobile phone with the antitheft alarm function, which comprises a display control module, a sound source control module, an alarm module, a signal transceiving module and a control circuit, wherein the signal transceiving module is used for controlling transmission and reception of a detection signal source and outputting the detection result; the control circuit is electrically connected with the above modules respectively; the alarm module is electrically connected with the display control module and the sound source control module; and the control circuit determines that the mobile phone is in an abnormal condition and enables the alarm module when the intensity of the detection signal in the detection result exceeds the preset range of a reference value.