Compact high-temperature superconducting cable

The invention discloses a compact high-temperature superconducting cable, which comprises a regular polygonal tube skeleton, a plurality of superconducting strip stacking groups and an outer sheath, the cross section of the regular polygonal tube skeleton is a regular polygon, the cross section of each superconductive strip stacking group is a trapezoid, and the multiple superconductive strip stacking groups are symmetrically distributed by taking the regular polygonal tube skeleton as a central point to form a superconductive material which is distributed in a circumferential array manner; the number of the superconductive strip stacking groups is the same as that of the edges of the regular polygonal tube framework, and the trapezoidal short edges of each superconductive strip stacking group are fixedly mounted on the outer side of each edge of the regular polygonal tube framework; the superconductive strip stacking group is formed by stacking multiple layers of superconductive strips, and the width of each