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 faultscene 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.