Pit sealing plate for sealing pit

The utility model discloses a pit sealing plate for sealing a pit, which comprises a handheld part, wherein the handheld part is riveted with a pit sealing plate body through a connecting rod; the pit sealing plate body is a square plate; the connecting rod is a telescopic connecting rod; and the edge of the square plate is of an arc shape. According to the pit sealing plate disclosed by the utility model, as the telescopic connecting rod is arranged on the pit sealing plate, when in work, the connecting rod can be conveniently extended; when not in work, the space occupation is reduced; and moreover, the edge of the pit sealing plate is subjected to arc treatment, so that the pit sealing plate is prevented from piercing a plastic film for sealing when sealing a fermentation tank, thereby greatly improving the sealing effect.