The invention discloses an isothermal and differential dual temperature forming die of a metal plate, which belongs to the technical field of moulds. The mould comprises a lower template, a terrace die, a blank holder, a concave die, an upper template, a guide pillar, a guide sleeve, a heating rod, a thermocouple and a hydraulic machine mandrel, and is characterized in that the terrace die is a dual terrace die and arranged on the lower template; the inside of the dual terrace die is hollow; the dual terrace die is divided into an upper cavity and a lower cavity; the lower end surface of the upper cavity is uniformly provided with a plurality of heating holes; the heating rod is arranged in the upper cavity; the thermocouple is arranged at the upper part of the dual terrace die; a coolingcore of the dual terrace die is fixed in the upper cavity of the dual terrace die; the lower part of the cooling core is provided with a water outlet hole and a water inlet hole of the upper cavity; the outer wall of the lower cavity of dual terrace die is provided with an outgoing line hole; and a water-stop plate is fixed at the lower part of the dual terrace die. The invention not only can realize the isothermal forming of the metal plate, but also can realize the differential forming, and ensure that high temperature cannot be transferred on a machine tool by a cooling device when the dieworks as well as ensure that the installing and forming precision and the service life of the die.