Combined frame box

The invention discloses a combined frame box. The combined frame box comprises a bottom frame, a top frame and four stand columns, wherein the bottom frame is composed of two bottom longitudinal beamsand two bottom transverse beams, the top frame is composed of two top longitudinal beams and two top transverse beams, and first connecting pieces are arranged at the two ends of the bottom longitudinal beams and the two ends of the top longitudinal beams. The two ends of the bottom transverse beams, the two ends of the top transverse beams and the two ends of the four stand columns are detachably connected with the first connecting pieces through first bolts correspondingly, each bottom longitudinal beam and each top longitudinal beam are formed by splicing a plurality of longitudinal beam units and a plurality of second connecting pieces respectively, and clamping blocks protruding outwards are arranged on the left side faces and the right side faces of the second connecting pieces; andclamping blocks protrudin