The invention relates to polycrystalline silicon ingot furnace equipment, and aims to provide a heat exchange platform of an improved structure for a polycrystalline silicon ingot furnace. The heat exchange platform is used for holding a polycrystalline silicon ingot furnace crucible and realizing heat exchange, and is provided with a gas inlet and a gas outlet; and the interior of the heat exchange platform is provided with a cooling gas channel, and is connected with the gas inlet and the gas outlet. Compared with the radiation cooling and the water-cooling type cooling technologies, the heat exchange platform disclosed by the invention is strong in control capacity and high in industrial controllability when being used for gas refrigeration; and furthermore, because the gas enters the heat exchange platform uniformly, the overall temperature of the heat exchange board is uniform, so that the uniform nucleation of a silicon melt at the bottom of the crucible is facilitated, and the temperature reduction speed at the bottom of the crucible in the crystal growth process can be precisely controlled.