The invention discloses a high-temperature superconducting coil electric field control structure. The high-temperature superconducting coil electric field control structure comprises a superconductingcoil, grading rings and a soft connection part, wherein the superconducting coil comprises a wire turn formed by winding a superconducting strip on an insulation framework and coil current leads arranged at the two ends of the wire turn; the grading rings are arranged at the two ends of the superconducting coil, and a grading ring wiring terminal is arranged on the inner side surface of each grading ring; the coil current leads and the grading ring wiring terminals are connected through the soft connection part; and the soft connection part comprises soft connection wiring terminals and a flexible belt, wherein the soft connection wiring terminals are arranged at the two ends of the flexible belt. According to the soft connection design, on the premise that the structure of the superconducting coil body and the relative position between the superconducting coil body structure and a low-temperature container are not changed, the electric field strength between the whole superconductingcoil and the low-temperature container can be greatly lowered; and the design is ingenious, and the manufacturing cost is lowered.