Abstract: Dual permanent magnet synchronous electric drive systems are widely used in high precision position synchronous drive. To solve the problem that the performance of position synchronization is easy to decrease due to load disturbance under the existing independent control strategy, an adaptive parameter tuning optimization strategy of the dual permanent magnet synchronous electric drive system with cross-coupling control is proposed. First, based on the transfer function method, the stability and bandwidth of the cross-coupling structure acting on the control of different positions of a single motor are analyzed, and the proportional-integral-derivative (PID) position synchronization control structure based on the current loop cross-coupling is proposed, which takes both stability and disturbance immunity into consideration. Then, based on the transfer function of frequency domain analysis, the coupling mapping relationship between PID controller parameters and the stability and disturbance immunity of the dual electric drive system is obtained theoretically, and the equivalent control parameters characterizing the stability and disturbance immunity of the system and the adaptive parameter tuning method against load disturbance are proposed. Finally, an experimental platform for dual permanent magnet synchronous motors is established, and comparative experiments are conducted with traditional PI control strategies under step and pulsating load conditions. The results show the effectiveness of the proposed control strategy for different loads at different speeds.