Hangzhi high-current sensor is a multi-point zero-flux technology system applied to the existing high-precision DC sensor technology. The excitation flux closed-loop control technology, self-excited fluxgate technology and multi-closed-loop control technology are combined to realize the excitation flux. , DC magnetic flux, AC magnetic flux zero-flux closed-loop control, and realize the detection of high-frequency ripple by building a high-frequency ripple induction channel, so that the sensor has relatively high gain and measurement accuracy in the full bandwidth range A current measurement and feedback component.