Low temperature solid reacting method for synthesizing cubic boron nitride

The invention relates to a low temperature solid reacting method for synthesizing cubic boron nitride, which comprises the following steps: after uniformly mixing a boron source, a nitrogen source and a phase inducer in a certain proportion, and putting the mixture into a sealed hot pressing kettle; after pressing the mixture at 100 to 600MPA into blocks, stopping pressing; after heating the hot pressing kettle to the temperature of between 200 and 450 DEG C, pressurizing to between 50 and 650MPa to perform constant temperature reaction for 6 to 48 hours, stopping heating, and naturally cooling down to room temperature; and post-treating the obtained product to obtain the cubic boron nitride. When the cubic boron nitride is synthesized by the method, the operation process is simple, the conditions are mild, and the cubic boron nitride which is approximate to pure phase and has good crystallization can be obtained at low temperature; and the method also has the characteristics of lightenvironmental pollution, low cost, and easy realization of synthesize in batch.