The invention provides a single insulator lifting device which comprises a cylindrical bracket, a bolt, a chain ring, a bolt clamping column and a cylinder-shaped safety lock sleeve, wherein the cylindrical bracket is provided with a concave opening formed in the lower part of the cylindrical bracket, and a bayonet formed in the bottom side surface and located on one side of the concave opening; the bolt penetrates through and is fixed at the upper part of the cylindrical bracket; the chain ring annularly sleeves the bolt; the bolt clamping column is fixed to the side surface of the cylindrical bracket; the cylinder-shaped safety lock sleeve comprises a closing bayonet located at the upper part of the cylinder-shaped side surface of the cylinder-shaped safety lock sleeve, and an opening bayonet located at the lower part of the cylinder-shaped side surface of the cylinder-shaped safety lock sleeve; the closing bayonet communicates with the opening bayonet; and the cylinder-shaped safety lock sleeve sleeves the cylindrical bracket, and is clamped to the bolt clamping column through the closing bayonet or the opening bayonet. By employing the single insulator lifting device, the mounting of a single insulator is facilitated, so that the convenience and the safety of overhead working of operating personnel are guaranteed.