Abstract: In view of the problems existing in the current power pipeline measurement technology, this paper selected the inertial gyroscope power pipeline measurement technology by comparison, proposed an improved variable-diameter inertial gyroscope support, and applied three-dimensional imaging technology to visualize the measured data and draw three-dimensional power pipeline path diagram when adapting to different sizes of inertial gyroscopes and pipelines of various diameters.The improved variable diameter bracket is proved by practical engineering measurement. The inertial gyroscope is effective, the device is light and flexible, the measurement is accurate, the reliability is high, and the cable path can be imaged by visualization technology. It plays an important role in modern power pipeline measurement, preventing cable breakage and improving power supply reliability.