The invention discloses a control method for correcting the thermal stability problem of an extra-high voltage looped network through multiple direct currents, and the method comprises the steps: 1, analyzing an N-2 fault thermal stability problem in a typical mode, including 1), the thermal stability limit of a target element; 2) simulation analysis of N-2 of each section of the looped network based on BPA steady-state and transient-state data files, and discovering of a thermal stability problem in combination with the step 1); 2, analyzing and determining equivalent transmitting and receiving ends of multiple direct currents for a target section line of the ring network; 3, adopting a gradient descent method to iteratively solve the direct current modulation quantity to obtain a modulation strategy, wherein the modulation strategy comprises the following steps: in the ith step of each iteration, 1) determining the direct current with the maximum sensitivity to participate in modulation; 2) determining a modulation direction, wherein the sending end is step-size reduction modulation, and the receiving end is step-size increase modulation, and 3) checking DC maximum control quantity constraints, other stability constraints and target constraints, and carrying out loop iteration until the constraints are satisfied.