The utility model discloses an electroscopic window for a cabinet door of a switch cabinet, which comprises a door panel, a sliding plate, an upper limit plate and a lower limit plate, wherein the sliding plate can slide clinging to the door panel in left-right mode between the upper limit plate and the lower limit plate. When the switch cabinet is in an operation state, a sliding plate lock catch and a door panel lock catch are fixed together through a padlock in fastening mode, and the sliding plate closes a window body. When the switch cabinet is in an electroscopic state, the sliding plate lock catch is clamped in a limit groove, and the sliding plate opens the window body. The electroscopic window for the cabinet door of the switch cabinet adopts a push-pull structure, is easy to operate, and has the advantages of being high in protection grade and structural strength, simple in processing and assembling, low in cost, small on the whole and convenient to set.