Theft protection key buckle

The utility model discloses an anti-theft key buckle, which comprises a fixing hook, a lock body and a key ring, wherein the fixing hook and the key ring are arranged at the two ends of the lock body; a sound-producing device, a switch and batteries are arranged in the lock body; the sound-producing device is electrically connected with the batteries and the switch; the anti-theft key buckle is characterized in that a key ring opening device is further arranged on the lock and provided with no less than two opening links; and the key ring opening device is linked with the switch. Since the key ring opening device provided with no less than two opening links is arranged, and linked with the switch, an alarm is given when the pickpocket opens the king ring, thereby serving the pre-alarm functions; the key ring can be opened through pressing the two opening links simultaneously, therefore, the pickpocket fails to pick a pocket by one hand, and the safety is higher; and the pre-alarm function can be realized thro