Snake repeller

The invention provides a snake repeller for transformer substations. The snake repeller has good effect in snake repelling without hurting the snakes and comprises a power supply, a time switch and a pulse generator connected in sequence. The pulse generator is disposed in a rainproof cover with both ends opening, and is connected between the time switch and the power supply. The pulse generator comprises a first metal wire mesh and a second metal wire mesh which are in parallel; a first diode is arranged between the power supply and the first metal wire mesh; a second diode is arranged between the power supply and the second metal wire mesh; the first diode and the second diode are opposite in direction; the first metal wire mesh and the second wire mesh are respectively perpendicular to the axis of the rainproof cover. The pulse generator capable of discharging electricity is arranged in a cable trench; when snakes get in the rainproof cover and touch the two metal wire meshes, the metal wire meshes serve a