At present, the transmitting coil of the dynamic wireless charging system of electric vehicles mostly adopts the segmented guide rail structure to realize the relay dynamic wireless charging. However, the mutual inductance drop problem will occur at the switching of the guide rail, which is more prominent at the corner, resulting in the reduction of the transmission efficiency of the system. This paper established the curve dynamic wireless charging model, deduced the relationship between the mutual inductance of the original secondary coil and the deflection angle through theoretical analysis, proposed an improved structure of the guideway transmitting coil at the curve, and built the curve dynamic wireless charging platform based on resonance magnetic coupling. Simulation and experiment show that compared with the traditional transmitting coil guide structure at the bend, the mutual inductance drop of the original secondary coil is significantly reduced in the wireless charging system with the improved guideway transmitting coil structure, and the system transmission efficiency is improved by 8%-9% at the maximum offset Angle, which verifies the effectiveness of the improved coil structure.