The invention relates to a short seal device dedicated to transformer test. The short seal device comprises a number of metal short seal clamps and copper connection wires connected between adjacent short seal clamps. Each metal short seal clamp comprises a scissor-shaped clamp body, a copper strip which is arranged at the upper part of the clamp body, and a fixing device which fixes the copper strip at the top of the clamp body. The bottom of each clamp body is sleeved by an insulating sleeve. Two semi-circular clamping bodies which can be buckled together are arranged at the upper part of each clamp body. Both ends of each copper strip are respectively fixed on two semi-circular clamping bodies through fixing devices, and both ends of the copper strip are accommodated in two semi-circular clamping bodies. According to the invention, the short seal device is used for short seal test; the short seal efficiency is improved; the short seal effect is improved; human factors are eliminated; only one time of short seal is needed when test is carried out, which is simple and quick; the short seal effect is great and is free of adjustment; the workload of test staff is greatly reduced; a short seal wire is prevented from repeated wrapping and checking; and the power outage time is greatly reduced.