The invention relates to a high-precision germanium tetrachloride (GeCl4) supplying method and high-precision germanium tetrachloride supplying equipment for manufacturing a core rod of an optical fiber preform rod. The equipment comprises a programmable logic controller (PLC) of evaporating equipment, a touch screen of the evaporating equipment, a PLC of VAD equipment, a heating tape I, a heating tape II, a heating tape III, a heating tape IV, a temperature sensor I, a temperature sensor II, a temperature sensor III, a temperature sensor IV, a pressure sensor, a liquid level sensor, a control valve I, a control valve II, a control valve III, a mass flow rate controller I, a mass flow rate controller II, an evaporating pot and a power supply, wherein the evaporating pot is provided with a liquid level sensor, the pressure sensor, the temperature sensor I and an electronic scale for monitoring the situation of the evaporating pot, the electronic scale is arranged at the bottom of the evaporating pot for monitoring weight in real time, the heating tape I is arranged outside the evaporating pot, a GeCl4 fluid delivery pipe is arranged on the evaporating pot, the control valve I is arranged on the GeCl4 fluid delivery pipe, an evaporating pot outlet pipeline is arranged on the evaporating pot, and the power supply supplies power to the evaporating equipment.