The invention discloses an establishment method and system of a damping bus simulation calculation model. The method comprises: dividing an equivalent air-core coil of a damping bus into three left-middle-right local coils, enabling the air-core coil to be equivalent to local coils which are of a left end and a right end and are connected in the same phase, and calculating inductance values of thelocal coils of the left end and the right end; enabling the air-core coil to be equivalent to the left-middle-right local coils connected in the same phase, and calculating an inductance value of a middle local coil; and establishing the damping bus simulation model according to the above-mentioned inductance values. Further, a damping resistor is used to be in parallel with the equivalent air-core coil in the damping bus to improve performance of the damping bus. The system includes a human-machine interaction unit, a calculating unit and a modeling unit. The human-machine interaction unit is used to receive turn numbers which are of the left-middle-right local coils and are input by a user, and calculate the inductance values of all the local coils. The calculating unit is used to calculate the inductance values of all the local coils. The modeling unit is used to establish the damping bus simulation calculation model.