Alarm cover for mobile telephone against stealing

An alarm cover for mobile telephone against stealing comprises a mobile phone cover and a suspending clamp. The utility model is characterized in that: the alarm cover is further provided with an alarming circuit; an alarm circuit board, battery, power switch and a button AN2 which is interlocked with the press handle of the suspending clamp button are mounted on the suspending clamp; a button AN3 is arranged at the hasp of the mobile phone cover. Switching on the power switch, the alarm cover is in forewarning status; the dismantling of the suspending clamp or the open of the hasp of the mobile phone can trigger the alarm circuit to alarm, warning the user; thus, the function of anti-pick or stealing prevention is achieved.