With the rapid development of more/all electric technology, the electro-mechanical actuation system is widely used in flight control surface actuation system. Considering the air load on the control surface and the connection stiffness, a complete mathematical model of the system was built by analyzing the architecture and working principle of the active/active parallel-redundant electro-mechanical actuator system. The main factors of static force fighting were studied by theoretical analysis, and the examples were simulated to verify and evaluate the influence of these factors on static force fighting. On this basis, the static force fighting of adjusting position deviation compensation, integral link force equilibrium technology and proportional integral link force equilibrium technology were proposed. The results show that: the main factors of static force fighting in parallel-redundant EMA are the static position deviation and the inconsistent connection stiffness in the channels, and their influence can be superimposed. The proportional-integral force equalization can eliminate the static force fighting more accurately, quickly and stably compared with traditional force equilibrium technology of the proportional integral link.