When a ground fault occurs on double-circuit transmission lines, the conventional tripping strategy may inject negative sequence components into the system. In addition the traditional autoreclosing scheme does not determine the fault feature before reclosing, and if it is reclosed to a permanent fault, the stability of the power system will be affected. To solve the above problems, phase-separation adaptive autoreclosing suitable for grounding faults on double-circuit transmission lines with shunt reactors is proposed. First, by establishing and analyzing the phase-to-phase coupling model of double-circuit transmission lines with shunt reactors, an improved tripping strategy that can avoid the injection of negative sequence components into the power system is proposed. Secondly, faulty phase shunt reactor current characteristics are analyzed for transient and permanent fault cases, respectively, and the fault nature criterion based on differential gate current of a faulty phase shunt reactor is proposed. Finally, the improved tripping strategy and fault nature criterion are combined to form a phase-separation adaptive autoreclosing suitable for grounding faults on double-circuit transmission lines with shunt reactors. The PSCAD/EMTDC simulation verifies that the proposed improved tripping strategy and phase-separation adaptive autoreclosing can avoid the injection of negative sequence components into the system and ensure the reclosing success rate of the transmission line in different ground fault types, fault locations and transition resistances.