The invention relates to a garbage can fixing device with a semi-closed bayonet. The garbage can fixing device with a semi-closed bayonet comprises a trolley support column, a support rod, adjustingsleeve buckles, a locking screw and a garbage bin hanging piece, wherein the adjusting sleeve buckles are fixedly arranged at two ends of the support rod; the adjusting sleeve buckle comprises an opencolumn containing ring body and a tightening lug plate; one end of the open column containing ring body is fixedly connected with the support rod; the tightening lug plate is arranged at one openingside of the open column containing ring body; the open column containing ring body and the tightening lug plate form an open column containing cavity. The open column containing ring body and the tightening lug plate are made of elastic materials, the minimum size of the open column containing cavity in a free state is smaller than the diameter of the trolley support column, the adjusting sleeve buckles are fixedly locked on the trolley support column through locking screws, the garbage can hanging piece is arranged on one side surface of the support plate, and the garbage can is sleeved on the garbage can hanging piece. According to the garbage can fixing device with semi-closed bayonet, the mounting and dismounting are more labor-saving, more convenient and more convenient, the bearing force is strong, the stability is good, the height of the garbage can fixing device on a trolley can be freely adjusted, and the garbage can fixing device is suitable for garbage can with different heights.