The invention relates to ground terminal pliers and a grounding method. The ground terminal pliers comprise a dynamic jaw, a static jaw, a triangular supporting point connecting plate, a ground wire connecting terminal, a resultant force holding rod, a main plier body holding rod, a supporting point spring, a cross section adjusting connecting rod, a fixed jackscrew, a cross section jackscrew rod and a return force holding rod. The dynamic jaw is hinged to the triangular supporting point connecting plate, the static jaw is provided with a ground wire connecting terminal, and the static jaw is connected with the main jaw body holding rod. The triangular supporting point connecting plate is hinged to one end of the resultant force holding rod, the other end of the resultant force holding rod is provided with the fixed jackscrew, and the triangular supporting point connecting plate is hinged to the main plier body holding rod. The ground terminal pliers and the grounding method have the advantages that the ground terminal pliers are used for improving the grounding flexibility and the safety of equipment, the accidents of electrical shock of human body caused by infirm grounding of ground wires are avoided, the grounding mode is flexible, the distance between the static jaw and the dynamic jaw can be adjusted according to demands, the working face and the angle of the dynamic jaw are automatically followed along with pressure, the cross section demands of different grounding bodies are met, it is guaranteed that the contact of the ground wires and grounding terminal is firm, and using is convenient.