The invention discloses a bus tube clamp. The bus tube clam is characterized by comprising an extension rod, wherein one end of the extension rod is provided with a metal hook, and the other end is provided with a grab handle; a fixed shaft is further arranged at the end, close to the metal hook, of the extension rod, a movably connected metal rod is arranged on the fixed shaft, and a rope is arranged on the metal rod; a fixing ring is arranged at one end, close to the grab handle, of the extension rod, the extension rod is fixedly connected with the metal hook, and the extension rod and the grab handle are hollow; the metal hook is provided with a wire, one end of the metal hook is connected with the metal hook body, and the other end of the metal hook extends out of the bottom of the grab handle through the extension rod and the inner side of the grab handle. Through the cooperation of the extension rod and the metal hook, the bus tube clamp can be separated from a bus tube by a certain distance for operation, the use safety is ensured, the bus tube clamp is simple in structure and is easy to use, and the working efficiency of detecting the resistance of the bus tube is effectively improved.