Abstract: For the situation of asymmetric horizontal offset between the capacitor plate positions during charging of the wireless power transmission system, the different degrees of influence on the transmission power and efficiency under the occurrence of horizontal offset are analyzed. The electric field coupling transmission system with two-side LCLC compensation topology is taken as the research object. The transmission power model of the wireless power transmission and efficiency system and the offset model under different offset distances are established. The system transmission power and efficiency are analyzed by theoretical simulation using Matlab. The results show that when the moving side of the plate is misaligned, the transmitted power P decreases nonlinearly and the system efficiency has high robustness at this time. When the bypass capacitance is selected to be less than the design value, the transmission power and efficiency degradation caused by the pole plate offset can be reduced to achieve the desired transmission effect. Finally, the theoretical analysis is verified by experiment.