The invention discloses a preparing method of a high-uniformity TC11 alloy bar for a blade. A TC11 titanium alloy precision forging blank subject to blooming forging and two-phase area forging is taken and heated below the phase change point, precision forging machine-fire multi-pass precision forging is adopted to obtain a medium precision forging blank; the medium precision forging blank is heated and subject to empty burning under the phase change point, and the structural uniformity of the medium precision forging blank is improved; the medium precision forging blank with the uniform structure is heated below the phase change point, and precision forging machine-fire multi-pass precision forging is adopted to form a finished product bar or the precision forging blank is subject to endcutting and discharging to prepare a rolled blank; the precision forging finished product bar is heated and subject to empty burning below the phase change point, and preparing of the high-uniformityTC11 precision forging bar for the blade is achieved or the rolled blank is heated below the phase change point; transverse column type hot rolling machine-fire multi-pass rolling is adopted to obtainthe high-uniformity TC11 rolled bar for the blade. The finally-obtained TC11 alloy precision forging and rolling bar for the blade is uniform and consistent in transverse high-power side and heart structure, the performance is stable, the corresponding material standard needs are met, the batch consistency is good, and the high-quality needs of an engine for the blade TC11 alloy bar are met.