Underground pipeline obvious point positioning surveying and mapping device and method

The invention discloses an underground pipeline obvious point positioning surveying and mapping device and method.The underground pipeline obvious point positioning surveying and mapping device comprises a transmitter and a receiver, the transmitter comprises a first key area, a touchable display screen, an output interface and a rechargeable battery pack, the touchable display screen is arranged in the middle area of the transmitter, and the first key area is arranged on one side of the touchable display screen; the receiver comprises a second key area and a second display screen, one side of the receiver is connected with a detection rod, the transmitter is used for being matched with the impedance of the underground pipeline and transmitting various types of frequencies, the receiver is used for receiving signals, and the receiver is used for receiving the signals. The underground pipeline is detected and positioned; according to the scheme, the measurement efficiency of the obvious points of the undergrou