The utility model provides a rod body connecting structure of a bedstead, which comprises first rods, second rods and fixing pieces, the first rods and the second rods are perpendicular to each other, the second rods are connected between the first rods on the two sides, the rod surfaces of the first rods, opposite to the second rods, are provided with inserting through holes for the second rods to be inserted, and the rod surfaces of the first rods, opposite to the second rods, are provided with fixing through holes. The fixing through holes are smaller than the
insertion through holes in area; the hole
diameter of the
insertion through hole in the axial direction of the first rod is larger than or smaller than the hole
diameter perpendicular to the axial direction of the first rod; an inserting end is arranged at the end of the second rod, the section of the inserting end is consistent with the shape and size of the inserting through hole, and the length of the inserting end in the axial direction of the second rod is larger than the
diameter of the first rod; the plug-in ends are matched with the plug-in through holes in a plug-in manner; the fixing piece penetrates through the fixing through hole and is limited by the rod surface where the fixing through hole is located; a connecting groove is formed in the end face of the inserting end in the axial direction of the second rod, and the fixing piece penetrates into the connecting groove and is detachably connected with the second rod. The utility model further provides a
bed frame and a sofa
bed.