Meter box observation window sealing structure

Provided is a meter box observation window sealing structure which comprises a transparent observation cover plate, a box body panel, and bolts. The transparent observation cover plate is arranged on the outer side of the box body panel. The bolts used for locking the transparent observation cover plate and the box body panel are disposed on the inner side, facing the interior of the box body, of the box body panel. A downwardly-recessed groove is disposed on the outer side of the box body panel. An observation through hole is arranged on the central part of the groove. A round of flange is disposed in the groove and along the edge of the observation through hole. On the bottom surface, facing the box body panel, of the transparent observation cover plate installed on the outer side of the box body panel, a round of surrounding edge is disposed along the outer edge of the transparent observation cover plate. The flange in the groove on the box body panel is lower than the outer surface of the box body panel.