The invention discloses a warm-keeping cup which consists of a cup lid and a cup body. The cup lid covers the top opening of the cup body freely. A heating plate used for separating the interior of the cup body is arranged in the bottom of the inner cup body. A battery is installed between the heating plate and the lower portion of the cup body. A warm-keeping wall is arranged in the inner wall of the cup body. A plurality of heating columns are vertically arranged in the side of the warm-keeping wall and spaced around the inner side of the warm-keeping wall. The heating columns and the heating plate are all connected with a battery circuit. The battery supplies the heating columns and the heating plate with energy to warm the liquid contained in the keep-warm cup. The warm-keeping cup is simple in structure, reasonable in design and long in warm-keeping time.