A grounding switch includes a contact terminal assembly, a square rotating shaft, a mounting and fixing assembly, and a driving assembly. The contact terminal assembly is connected with a moving contact terminal of the grounding switch to control the grounding switch to be switched on or grounded. The contact terminal assembly is connected to the square rotating shaft; the square rotating shaft isused to control the rotation of the contact terminal assembly; the mounting and fixing assembly is used to fix the driving assembly and the square rotating shaft, the mounting and fixing assembly isdivided into two parts, one of the two parts is used to fix the driving assembly while the other part is connected with the rotatable square rotating shaft in a sleeving manner, the driving assembly is used to drive the square rotating shaft to rotate, the square rotating shaft is provided with power to rotate by the driving assembly through a connecting rod driving mode, the driving assembly is fixed on the mounting and fixing assembly, and the driving assembly is connected with the rotatable square rotating shaft is a sleeving manner. The grounding switch disclosed in the invention can be free of limitation by the driving assembly during usage and is advantageous in that jamming cannot be caused.