Signal antenna capable of hanging heavy object

The utility model discloses a signal antenna capable of hanging a heavy object, which comprises a transmitting section clamped at the position of an opening of a sewage well lid, an extension section arranged along the horizontal direction and detachably connected with the transmitting section at the position of the bottom of the sewage well lid, and a telescopic section rotationally connected to the extension section, the underground measuring equipment is arranged at the bottom of the telescopic section, the antenna body is arranged in the transmitting section, and the signal transmission line is arranged in the extension section and the telescopic section and can electrically connect the underground measuring equipment with the antenna body. According to the signal antenna capable of hanging the heavy object, the distance between the telescopic section and a sewage well wall can be increased, and when a sewage well cover is opened and closed, the telescopic section can be shortened to the maximum extent, s