The present invention relates to an integrated constant temperature heating plate which comprises a heat conducting plate, a heating layer arranged at the back side of the heat conducting plate, and a heat insulation layer which coats the back side and two ends of the heating layer. The side of the heat conducting plate is provided with a bending plate, the bending plate and the heat conducting plate are arranged in a U-shaped way and are used for fitting the bottom surface of the heat insulation layer, phenomena of deformation and collapse caused by improper support and installation or gravity are not worried, the mechanical strength is improved, the heat shock resistance performance is good, the service life is prolonged, and the cost is reduced. A parallel heating mode of double conductive wires and double loops is used by the heating layer, the two groups of loops are provided with temperature controllers, the temperature differences of the temperature controllers are limited within 5 DEG C, thus an effect of stabilizing temperature is achieved, a constant temperature effect is achieved, at the same time the front surface of a heat conducting layer is provided with micro meshes, the uniform heat radiation effect of the heat conducting plate is effectively enhanced, the blocking of thermal energy by metal is reduced, and the human comfort is improved.