Connecting structure between accessory casing and accessory

The invention belongs to the technical field of aerospace, and particularly relates to a connecting structure between an accessory casing and an accessory, which comprises two clamping rings, an annular belt, a bushing, a bolt, a nut and a spacer sleeve, the ring belt is attached to the outer surfaces of the two clamping rings, a first sleeve buckle and a second sleeve buckle are arranged at the two end points of the ring belt respectively, and open seams are formed in the first sleeve buckle and the second sleeve buckle respectively. A first opening is formed in the side wall of the lining, a second opening is formed opposite to the first opening, and the lining is arranged on the first sleeve buckle in a sleeving mode; the spacer sleeve is provided with a first column and a second column vertically installed in the middle of the first column, the first column is sleeved with the second sleeve buckle, the second column extends out through the open seam and is provided with a through hole, and the limiting en