The invention discloses an adaptive transmitting end position adjusting method for improving the interoperability of electric vehicle wireless charging coils. In the method, a controller, a transmitting end and a receiving end are adopted to establish a system circuit model, a coupling coefficient meeting charging requirements in interoperation of a rectangular coil and a DD coil and a coupling coefficient obtained by calculation are acquired to adjust the position of the transmitting end, and then the coupling coefficient in the XY direction infinitely approaches the coupling coefficient meeting the charging requirements in interoperation of the rectangular coil and the DD coil. Based on a variable-step-size 'disturbance-observation' algorithm, no complicated mathematical calculation is needed, no extra communication circuit is needed, the coupling coefficient can be predicted simply by measuring transmitting end or ground equipment parameters and serves as a basis for position adjustment, the system structure is simplified, and the disturbance of a strong magnetic field to wireless communication is avoided.