A tent cloth connecting structure for a fold-up tent includes a leg pole including first and second poles that slide relative to one another; and a tent cloth having a lower portion disposed with a first connecting unit and a first flexible element, a second connecting unit disposed above the first connecting unit, and a sliding element attached to the tent cloth and slidably connected to the first pole. The sliding element and a lower portion of the first pole are retained by a locking structure. The first pole is disposed with a limit structure limiting passage of the second connecting unit and having a protruding portion. The second connecting unit includes a connecting base slidably connected to the first pole and located below the protruding portion which limits the passage of the connecting base, and a second flexible element that connects the connecting base and the tent cloth.