Method for establishing signal diagram used for determining two ends of same cable

The invention discloses a method for establishing a signal diagram used for determining the two ends of the same cable. A cable data signal is acquired through field operation and transmitted to a software operation end to establish an oscillogram and a receiving end working condition diagram, and the oscillogram, the receiving end working condition diagram and a sending end working condition diagram are combined to form the signal diagram used for determining the two ends of the same cable among multiple cables of an underground working well. According to the method for establishing the signal diagram, the signal receiving oscillogram is formed in the mode that the signal is sent from one end of the cable and received at the other end of the cable, and the other correct end of the cable is analyzed and distinguished according to a sending end cable clamp picture and a receiving end cable clamp picture. Through the signal diagram established according to the method, the two ends of the same cable among the multiple cables of the underground working well can be recognized accurately, and therefore workers can lay, maintain and manage the underground cables conveniently.