Fault location methods for the neutral point non-effective grounding system single-phase grounding fault at host station are not suitable for complex network, which have weak fault tolerance. This paper presents a fault location method based on transient component genetic algorithm. The method encodes transient components using the phase relationship between transient zero-sequence current and bus zero-sequence voltage. Host station receives the code, searches for fault section by genetic algorithm and outputs search results. The method is also applicable to neutral non-grounding system and resonance grounding system, the terminals do not need GPS to compare time, and the criterion it needs is easy to obtain. The method also has fault tolerance. The on-site experiments have been carried out to prove the feasibility of the method.