The invention relates to an insulating support suitable for multiple terrains for a high-voltage cable frequency conversion series resonance test. The insulating support suitable for the multiple terrains for the high-voltage cable frequency conversion series resonance test comprises a corner insulating support set, a general insulating support set, insulating ropes, detachable knapsack belt fasteners, leading wire jetting-outs, detachable skirts and insulating rubber hoses. The corner insulating support set and the general insulating support set are mounted on a transformer substation where a high-voltage crosslinked cable frequency conversion series resonance test needs to be carried out according to terrains, the corner insulating support set and the general insulating support set are fixed through the detachable knapsack belt fasteners, and the test leading wires of various specifications and corrugated pipes of various specifications are hung or supported through the insulating ropes, the leading wire jetting-outs and the detachable skirts. Compared with the prior art, the insulating support suitable for the multiple terrains for the high-voltage cable frequency conversion series resonance test has the advantages of being good in insulativity, strong in universality, convenient to use and the like.