The invention discloses a metal smelting furnace. The metal smelting furnace comprises a furnace bottom, a furnace wall, a furnace top wall, a furnace door and a hearth. The upper half part of the hearth is a hot smoke chamber, and metal to be heated is placed in the lower half part of the hearth. A strengthened heat transfer layer used for increasing the heat absorbing speed of the metal is arranged between the upper half part and the lower half part of the hearth. According to the metal smelting furnace, the heat of the hot smoke in the upper half part of the hearth is transmitted to the lower half part, the heat transfer strength of the heated metal is increased to more than two times till tens of times, the exhaust temperature is directly caused to be reduced, the heat losses are reduced, the metal temperature rising speed is increased, the fuel combustion time is shortened, and the obvious energy saving effect can be generated.