Combined house box

The invention relates to the field of containers and provides a combined house box. The combined house box comprises at least two house box single bodies. Each house box single body comprises a top cover, a bottom plate, side plates and an end cover, wherein the top cover comprises an upper corner fitting and a top plate, the bottom plate comprises a lower corner fitting and a floor, and a vertical corner column is arranged between the top cover and the bottom plate. Corresponding adjacent upper corner fittings of every two adjacent house box single bodies are connected in a welding mode, and corresponding adjacent lower corner fittings of every two adjacent house box single bodies are connected in a welding mode. Corresponding adjacent corner columns of every two adjacent house box single bodies are connected through a connecting piece, wherein the connecting piece is a U-type bent piece and wraps the two adjacent corner columns, and three inner lateral sides of the connecting piece are connected with matched outer lateral sides of the two corner columns respectively in a welding mode. The combined house box is firm in connection and good in airtightness.