An embodiment of the present invention discloses a heating plate comprising a cast iron blank, a heat generating tube and a heat insulating powder layer. Wherein the upper surface of the cast iron blank is provided with a recess for placing a heat generating tube. Thereof a heat-generating tube is pressing-fitted into the recess and is fitted with the recess, and both ends of the heat-generating tube are respectively provided with a leading pin perpendicular to the horizontal plane. And the upper surface of the heat-insulating powder layer where is provided two pin holes respectively connected with the heat generating tube leading pins, and the leading pins pass through the lead pin holes. And it is an object of the present invention to provide a heating plate with high efficiency and high reliability.