The invention discloses a box sealing machine for Baijiu box sealing. The box sealing machine comprises a host machine frame, a cover sealing mechanism, an ascending and descending mechanism, a hinge mechanism, a box conveying conveyance chain mechanism and a tongue beating and tongue pressing mechanism, wherein the host machine frame is provided with a protection door; the cover sealing mechanism, the ascending and descending mechanism, the hinge mechanism, the box conveying conveyance chain mechanism and the tongue beating and tongue pressing mechanism are fixed on the host machine frame; the hinge mechanism comprises a front hinge swinging arm mechanism, a left hinge swinging arm mechanism and a right hinge swinging arm mechanism; the front hinge swinging arm mechanism can forwards and backwards swing; the left hinge swinging arm mechanism and the right hinge swinging arm mechanism are in symmetrical arrangement and can leftwards and rightwards swing; the ascending and descending mechanism comprises an ascending and descending plate, an ascending and descending air cylinder, two guide rods and a horizontal telescopic plate mechanism; the cover sealing mechanism is positioned under the ascending and descending plate, and comprises a fixing frame, a suction disc assembly, a tongue folding assembly, a tongue pressing assembly and a position limiting plate; the upper end of the fixing frame is provided with a fixed hinging seat; the suction disc assembly, the tongue folding assembly, the tongue pressing assembly and the position limiting plate are arranged on the fixing frame. Through the cover sealing mechanism, the descending and descending mechanism, the hinge mechanism, the box conveying conveyance chain mechanism and the tongue beating and tongue pressing mechanism, the automatic hinge installation during the box sealing is realized; the insertion of the hinge, and a big tongue and a small tongue of the box body is completed; the operation efficiency and the automation degree are high; the cost is reduced; the structure is simple; the size is small; the weight is light; the universality is high.