The invention relates to application of 2,6-lithium dimethyl aniline, and particularly relates to the application of the 2,6-lithium dimethyl aniline to catalyzing hydroboration of imine and borane. Acatalyst, the borane and the imine are sequentially evenly mixed, reacted for 1-2 hours, and exposed in the air to terminate the reaction, a reaction liquid is decompressed to remove a solvent, and borate having different substituent groups is obtained. The disclosed 2,6-lithium dimethyl aniline can catalyze the hydroboration of the imine and the borane at high activity under the condition of room temperature, the use level of the catalyst is only 4-5 mol% of the molar weight of the imine, the reaction reaches the yield of more than 90%, compared with the existing catalysis system, the simple2,6-lithium dimethyl aniline is used, the reaction condition is mild, and the yield of the borate having different substituent groups is up to 99% under the optimized condition.