The invention relates to the technical field of protection instruments and provides a watch provided with a security device. The watch comprises a wristguard 1, a watch body 2 and a rope device 3 and is characterized in that the rope device 3 is installed on the upper side of the wristguard 1 and comprises a rope box 4, a rope body 5, a rope loop 6a, a rope loop 6b, a buckle 7, an ejection part 8, an ejection head 9 and an ejection button 10. The watch can be used for timing, can serve as a decoration and can also be used for riot control and thief catching. Due to the arrangement of an automatic firing device, operation is convenient. The success rate of catching a target through the rope device is high. The rope device is retractable and convenient to store and carry. The watch is wide in application range. For civil use, the watch can be used for defense and riot control, and for police use, the watch can be used for arresting suspects and preventing violence conducted by villains.