Box foaming fixture

The invention discloses a box foaming fixture; a box to be foamed is put in a foaming mold outer box, and comprises a box panel and a box liner; the foaming mold outer box comprises a main plate; a pressing plate is arranged at the inner side of the main plate, and is connected with the main plate through a clamping mechanism; and a mold insert can be arranged between the inner side of the main plate and the pressing plate to adjust a gap between the inner side of the main plate and the pressing plate. The box foaming fixture is provided with the pressing plate and the clamping mechanism in the length direction of the foaming mold outer box; multiple sets of pressing strip grooves with different depths are arranged on the pressing plate; and mold inserts are inserted in the grooves with different depths to realize fine adjustment of the position of the pressing plate to adapt to the box height difference, so that a foaming mold can adapt to the foaming of boxes with two or more height specifications without needing repeated mold adjustment. The box foaming fixture reduces the wrong operation of workers, reduces the foaming missing phenomenon, and greatly improves the production efficiency.