The invention discloses 1000kV ultra-high voltage CVT (constant-voltage transformer) disposable wiring automatic testing device and method. The 1000kV ultra-high voltage CVT disposable wiring automatic testing device comprises five wiring points including a wiring point a, a wiring point b, a wiring point c, a wiring point d and a wiring point & and six measurement interfaces including a first high-voltage sampling interface GX1 connected with the point a, a second low-voltage sampling interface CX2 connected with the point b, a second high-voltage sampling interface GX2 connected with the point c, a first low-voltage sampling interface CX1 connected with the point d, a CVT self-excitation high-voltage special interface CVT-HV connected with the point & and a CVT self-excitation low-voltage output interface CVT-LV connected with a group of voltage reduction coils of a secondary coil of a first transformer in a CVT circuit respectively. According to the 1000kV ultra-high voltage CVT disposable wiring automatic testing device, through effective function integration, disposable wiring and disposable measurement are realized, the working efficiency is improved, the labor intensity is lowered, and the testing time is effectively shortened.