The invention discloses a secondary pouring construction device for a small structure hole. The secondary pouring construction device comprises a wood plastic board, a foam double-side glue layer, a plastic formwork working face layer, two batten keels, two upper ejecting trays and two supporting steel pipes. The foam double-side glue layer is laid on the upper board face of the wood plastic board, and the area of the foam double-side glue layer is equal to that of the upper board face of the wood plastic board. The plastic formwork working face layer is laid on the foam double-side glue layer, and the area of the plastic formwork working face layer is smaller than that of the foam double-side glue layer. The two batten keels are installed below the wood plastic board in parallel. Tray bodies at the upper ends of the two upper ejecting trays support the two batten keels, and the lower ends of the two upper ejecting trays are inserted in the top ends of the two supporting steel pipes for vertical supporting respectively. The secondary pouring construction device for the small structure hole solves the problem of grout leakage in the pouring process, the surface obtained after pouring does not need to be handled again, and good application prospects are achieved.