The utility model discloses a grounding switch applied to a low end direct current valve hall, and relates to the field of direct current transmission and transformation equipment. According to the utility model, a grounding conductive rod is formed by welding two parts of a thick tube and a thin tube together; the weight is effectively reduced; mechanism operation is convenient; a switch chassis and a steering bracket are fixedly connected with the wall of the valve hall through adjusting screws; the angle and the distance from the wall can be freely adjusted; a dynamic contact and a contact seat are in sliding structure; the position of the dynamic contact on the grounding conductive rod can be freely adjusted; a first crank arm end face of a conductive rod rotating device in a zigzag long hole structure; free adjusting can be carried out when installation is carried out; field switch debugging is convenient; the operation forces of closing and opening are moderate; a movement process is stable and reliable; and the service life of the grounding switch is prolonged.