Abstract: In view of the problems like mismatch, poor firmness and failure to judge the clamping degree when hanging the traditional grounding wire at the cable heads of the rear cabinet of switchgear, a new grounding device suitable for the cable heads of switchgear is designed, which features reliable connection, convenient operation, high-safety performance, and is available for data quantification of the clamping degree of grounding wire clamps. The practical test shows that the grounding device is safe and reliable.