The invention belongs to the technical field of electrical power systems and automation thereof, and provides a method for calculating interactive-influenced electricity transmission limit with multiple sections and a stable transmission level. The invention can be applied to the safe and stable off-line analysis calculation, real-time early warning and on-line auxiliary decision making of the electrical power systems. The method comprises the following steps of: firstly, determining electricity transmission section collection to be inspected; secondly, appointing one anticipated fault scene for each electricity transmission section; thirdly, taking one tidal current of the ground state of the electrical power system; fourthly, carrying out time domain simulation on each anticipated fault scene according to the tidal current of the ground state, the model and the parameters of the electrical power system, and calculating a system stability margin led by each section by adopting EEAC (Extended Equal Area Criterion) based on the simulation track; fifthly, stopping the calculation if the stable transmission level achieves the ultimate set value of the number of the transmission sections; and sixthly, perturbing the power of the section gradually in the mode of adjusting the running mode of the system to form a new tidal current of the electrical power system, and forming the perturbation matrix of the power of the section.