Abstract: In the mobile wireless charging process of the electric vehicle in the segmented rail mode, in order for the primary side resonance network to effectively detect the load access and timely convert between the low power standby state and the power output state, this paper proposes a load detection method with an LCC compensation structure on each original secondary side and a rail power output control strategy. Based on this dynamic wireless charging process of the electric vehicle in the segmented guide mode and the mathematical model with a double LCC compensation structure, the mathematical relationship is obtained between the lateral displacement of the electric vehicle on the primary rail and the input current of the primary side. Whether the guide rail is in the power transmission state is determined through detecting and analyzing the input current of the primary side. Simulation and experiment verify the effectiveness of the method.