The utility model discloses a simple barrier for a transformer substation. The simple barrier comprises a base, two magnets which are arranged at intervals are supportively mounted at the bottom of the base, and the base is connected with an elastic barrier belt through a lock catch device. A warping plate inserted between the two magnets is arranged at the bottom of the base and provided with an axially extending slide, a fixing shaft matched with the slide is fixedly arranged at the bottom of the base, and a limiter preventing the fixing shaft from sliding is fixedly arranged at the tail end of the fixing shaft. Pull rings are arranged at two ends of the warping plate fixedly. With the pull rings, the ends of the warping plate can be held conveniently, and use is convenient. The simple barrier for the transformer substation is reasonable in structure and small in size, can be used in any positions of equipment in the transformer substation and used by demounting and cross combination and is particularly applicable to maintenance of the transformer substation.