The utility model provides a combustion synthesizing quasi isostatic pressing heating device, which is composed of a plunger tip (1), a pressing cover (2), an igniting device (4), a heat insulating material (5), a steel die (6), a heating coil (7) and a dielectric body (8), wherein, the dimension of the pressing cover is as follows: the diameter is phi 60-phi 100 mm, and the height is 40-80 mm. The diameter of the steel die is phi 120-phi 160 mm, and the diameter of the inner hole is phi 60-phi 100 mm. The heat insulating material adopts the sand, the grain size of which is between 250-850 mu m. The heating coil adopts FeCrAl material, the heating power is 300-800 watt, and the heating temperature is at the indoor temperature of negative 800 DEG C. The utility model has the advantages of simple design and convenient operation, and solves the problems of product concretion and densification. The heat insulating property is good, so the utility model causes the reaction to obtain higher temperature, which causes the entire reaction to be carried out under the liquid condition and to be finished instantly. The reaction and the sintering are carried out simultaneously, which reduces the complexity of the technology and greatly decreases the formation of the secondary waste consequently.