The utility model discloses a device body structure of an amorphous alloy grounding transformer, which comprises a three-frame three-column type amorphous alloy iron core, a high-low voltage coil and four combination clamping pieces, wherein the high-low voltage coil is sleeved on iron core columns and arranged in a coaxial layer mode that the low voltage coil is arranged on the inner and the high voltage coil is arranged on the outer, and the four combination clamping pieces are arranged on the upper, the lower and the two sides of the high and the low voltage coils. The iron core is rolled by an amorphous metal material, a cross section of the iron core column is of a rectangle, the high-low voltage coil is a whole rectangular coil, an insulated framework is arranged in the low voltage coil, and the high voltage coil is divided into two stages of coils which turns are equal according to a radial direction. The three-frame three-column type amorphous alloy iron core is hanged on the high-low voltage coil, the four combination clamping pieces respectively clamp a three-phase coil along the radial direction and a horizontal direction through an insulation cushion block and an insulation plate, thereby forming a solid whole. The utility model has the advantages of low no-load loss, small no-load current, firm device body structure, the coil is capable of bearing the attack of the system fault current, and the iron core is not effected by an electrodynamic force of the coil.