During the whole process of intermittent earth fault, the significance of each fault feature changes over time. This paper presents a faulty line selection method based on information in the whole process of intermittent earth fault. First the stages of earth fault are divided. Then the algorithms are designed accordingly utilizing the transient component of selected frequency band (SFB) and the steady component of zero sequence active power, in order to make full use of both transient and steady fault features in the whole process, and to maximize the effect of each algorithm. Considering the high-frequency output characteristic of Petersen coil based on thyristor controlled reactor (TCR), a new criterion of transient power magnitude of SFB is designed to avoid the negative effects of the high-frequency components. According to simulation results, the proposed method has a high accuracy and reliability in faulty line selection of different kinds of single-phase-to-ground faults in resonant grounding system with Petersen coil based on TCR, including intermittent earth faults. This work is supported by National Natural Science Foundation of China (No. 51477057).