The invention discloses an assembled operating room. The assembled operating room comprises upper keels, stand columns, cross beams and three lower keels; two symmetrically-distributed fixing plates are arranged on the outer side surface of each lower keel; fixing holes are formed in the middles of the fixing plates; the tips of the adjacent lower keels are arranged correspondingly through connecting buckles; each connecting buckle comprises a buckle body, a bolt hole, a second inserting hole and a first inserting hole, the buckle body adopts the arc-shaped structure, the second inserting holeand the first inserting hole are formed in two vertical side surfaces of the buckle body respectively, and the bolt hole is formed in the horizontal side surface of the buckle body; the stand columns, the upper keels and the lower keels are fixed in an inserting manner to the bolt holes, the second inserting holes and the first inserting holes; the upper ends of the lower keels and the lower endsof side plates are arranged correspondingly; and the two ends of the stand columns are connected with the connecting buckles. The assembled operating room is assembled in a connecting manner of inserting and interlocking, so that the assembling speed is high, and the efficiency is high, and with the adoption of the interlocking manner, the structure is firmer and more stable; and the assembled operating room can be put into use quickly after being assembled, so that the time is saved for building of an emergency operating room.