Logging cable degree of depth land mark system

The utility model relates to a logging cable degree of depth land mark system, including logging cable winch, ground tensioning wheelset, ground tensioning controlling means, dark measuring device and automatically controlled winch device to add ground magnetism mark module, ground processing module on this basis, and ground magnetism mark module is linked with ground processing module respectively with dark measuring device. Ground magnetism mark module is including annotating magnetic coil, anti magnetized coil and magnetic pick-up coil to and by power, signal balanced protection, instrument amplify, filter amplifier, pulse nurse one's health, cpu control, amplify drive, ground magnetism mark marking circuit module that the data communication circuit is formed, ground processing module include: power, code signal recovering, plastic, count, correction, treater, communication, mark are handled, the host computer circuit. Have with low costsly, man-hour is short, demarcation that can on-the-spot completion overlength cable (being greater than 5000 meters), and mark degree of depth precision is high, the accuracy is good.