The invention discloses an earth fault line selection method having an error correction function. The method is characterized by, judging whether the difference value of electric quantity change information characteristics of a fault line and a non-fault line surpasses a preset value; if so, directly selecting the fault line; or otherwise, calculating credibility of each line being the fault line and carrying out ranking, and carrying out tripping in sequence according to the large-to-small sequence of the credibility until selecting the fault line. The method can display credibility of a plurality of lines simultaneously; and an operator on duty can select the fault line with reference of the displayed information and with experience being combined, thereby reducing non-fault line power failure and improving power supply reliability of an electric system.