Based on the research on multi-mode clutch transmission, the stability challenges under parallel driving conditions were explored. The study found that designing multi-mode clutches and coordinating control of multiple motors is the core method to solve this problem. The core lies in achieving efficient energy transfer through multi-mode clutches and coordinated control of multiple motors, to meet the stability and energy efficiency optimization goals of hybrid electric vehicles under different operating conditions. However, under rapid acceleration conditions, unbalanced torque distribution may lead to differences in the speeds of the inner and outer loops, causing the “de-parallel” phenomenon, which affects the acceleration performance and energy efficiency of the vehicle. To solve this problem, a dynamic power distribution control strategy for parallel driving was proposed. By calculating the minimum distribution ratio of residual power and dynamically adjusting the power distribution according to actual needs, the balance of angular acceleration between the inner and outer loops was achieved, avoiding the exit of the parallel working state. Experimental results show that during the simulation period, the optimized control strategy not only improved the stability and robustness of the system, but also enhanced energy efficiency, providing important reference basis for the design of parallel hybrid wide-area power grid systems. This research provides theoretical support and technical guidance for the stability of parallel multi-mode clutch transmission in practical applications.