Antitheft alarm for mobile phone

The utility model relates to the technical field of prevention of thievery of mobile phones, and particularly provides an antitheft alarm for a mobile phone. The antitheft alarm for a mobile phone includes a first antitheft part and a second antitheft part, the first antitheft part is connected with the mobile phone, and includes a first power supply, a first wireless transceiving module, a first comparison device used for comparing received data with prestored data and a first buzzer which gives an alarm when a comparison fails, and both the first buzzer and the first wireless transceiving module are connected with the first comparison device; the second antitheft part and the first antitheft part have the same structures; when the antitheft alarm for the mobile phone works, the first wireless transceiving module communicates with a second wireless transceiving module in a matched mode; and the prestored data of the first comparison device and a second comparison device are matched. When a distance of the first antitheft part and the second antitheft part increases to a certain value, the two antitheft parts give out alarm sound, thereby prompting a victim that the mobile phone is stolen and indicating the position of the mobile phone that is stolen, so that circumstances that mobile phones are stolen are reduced.