The invention relates to a precision forging method of titanium alloy blade. The forging method comprises a finish forging process and a trimming process, wherein the finish forging process comprises the following steps: (1) coating glass lubricant on the surface of a pre-forged blade forging, then heating the blade forging to the forming temperature, and maintaining the temperature for 15-30 minutes; (2) coating die lubricant on dies, respectively placing the upper die and the lower die on an upper die holder and a lower die holder, and arranging the blade forging in the upper die and the lower die; and (3) forging the blade forging by using a screw press based on the dimension requirements. The trimming process comprises the following steps: arranging the finish-forged blade forging in a trimming die, and trimming the blade forging at room temperature. The forging method has the advantages of low raw material consumption, good combination property and long service life of the obtained blade and the like.