Multi-channel grounding on-resistance measuring device and measuring method

The invention provides a multi-channel grounding on-resistance measuring device and method, and the device comprises a test clamp which is used for connecting a grounding down lead node of a grounding grid and providing a test terminal; the microprocessor module is used for generating a control instruction and receiving a measurement result fed back by the LCR digital bridge; the signal conditioning module is used for receiving the voltage signal of the test terminal and converting the voltage signal into a conditioning voltage signal; the LCR digital bridge is used for measuring the resistance between any group of test terminals according to the conditioning voltage signal; and the channel switching matrix module is used for switching the connection relationship among the LCR digital bridge, the signal conditioning module and different test terminals according to the control instruction. According to the invention, multi-channel switching is realized, measurement of the on-resistance between any one group of