The invention, which belongs to the field of the power ground technology, discloses a ground wire connecting apparatus. Key points of the technical scheme are as follows: the provided ground wire connecting apparatus is mainly formed by a grounding electrode and a ground wire plugging head, wherein the grounding electrode and the ground wire plugging head are plugged with each other. One end of the ground wire plugging head is provided with a seat body connected with a ground wire and the other end has a cylindrical structure matching a grounding electrode plugging hole; and an arc groove is formed in the cylinder along the peripheral direction. A compression mechanism is arranged at the upper portion of the grounding electrode. According to the invention, the ground wire and the ground wire plugging head are installed together fixedly and firmly without any shedding; and the contact is reliable. Therefore, ground wire dismounting and mounting become convenient and rapid and the work efficiency is high; and leads with different types and specifications can be compacted rapidly. In addition, connection of the ground wire plugging head and the grounding electrode is realized by the spring pressure; and the grounding resistance is over 2 ohms based on testing, so that the regulation and requirement are met. Therefore, the provided apparatus has the high promotion and application value.