Cable breakpoint positioner in perforating gun and positioning method thereof

The invention provides a cable breakpoint positioner in a perforating gun and a positioning method of the cable breakpoint positioner. The cable breakpoint positioner at least comprises a pulse processing unit which is used for transmitting pulse electromagnetic waves and displaying the breakpoint position of a target perforating gun cable and a detection instrument unit used for receiving the pulse electromagnetic wave and detecting the breakpoint position of the target perforating gun cable. The cable breakpoint positioner in the perforating gun is divided into an indoor part and an outdoorpart; a data signal receiver receives emission data of an outdoor data signal emitter in a safe indoor environment, non-contact detection is achieved in the whole detection process, the detection personnel do not need to disassemble each section of perforation cluster and do not need to make contact with a cannonball barrel, so that personal safety and reliability are greatly improved. In addition, a pulse current weakeni