In order to reduce the power drop of dynamic wireless charging system at the transmission rail switch, a new coupling mechanism of dual channel dynamic wireless charging system is designed. The LCC-LCC compensation topology is selected to design two energy transmission channels. By using the constant current characteristics of LCC-LCC compensation topology, the relationship between system output and loss and two channel coupling parameters is deduced, which realizes relatively stable power transmission and improves the anti offset characteristics and anti drop ability of the system. Finally, the proposed method is simulated and tested to verify the feasibility of the two-channel dynamic wireless power transmission scheme.