The invention relates to a hybrid line fault location method based on fault area fast identification. The method is characterized by, to begin with, collecting three-phase electrical data at the two ends of a hybrid line system by utilizing a power transformer at the protection installation place, and calculating a positive-sequence component through a symmetrical component method; then, constructing a fault area recognition function through the positive-sequence electrical component at the two ends of the hybrid line system, and judging a fault area according to phase characteristics of the fault area recognition function at a line connection point; and finally, calculating fault distance on a fault line section by utilizing a fault distance analytical expression.