Early production and operation of the Huainan-Shanghai UHV project will form a 1000 kV/500 kV/220 kV electromagnetic loop network along the Jiangsu UHV, which has an impact on the short-circuit current of power grid. BPA short-circuit current calculation result shows that after UHV's access to the Jiangsu power grid, the short-circuit current of the 500 kV bus in Shipai and the 220 kV bus in load intensive subsystem of western Suzhou increases in different degrees. According to the phenomenon, a short-circuit current suppression measures based on the strategy of dynamic partitioning including unlocking the electromagnetic loop network and load transfer is proposed, along with the analysis of actual examples. Case analysis verifies the reliability of the proposed current limiting measures, and provides a reference value for reducing the short-circuit current in engineering practice.