The invention relates to a fault range finding method for a power transmission circuit by use of current travelling waves and voltage travelling waves of two ends of the circuit, and belongs to the technical field of fault range finding of electric power systems. When a power supply circuit fails, current travelling waves and voltage travelling waves of the circuit are acquired from two measurement points of the circuit. Reflection wave head recognition is performed on the current travelling waves and the voltage travelling waves of the two ends of the circuit through continuous wavelet transformation and four groups of fault distance data is acquired according to initial travelling wave heads and emission wave heads. Composite integration is performed on the four groups of the data by use of the global geometrical average optimal method, so fault range finding of the power transmission circuit is achieved. According to the invention, accuracy of fault range finding of the power transmission circuit can be effectively improved and the method is quite highly reliable.