The invention discloses a glass fiber chemical raw material storage tank and a control method thereof. The storage tank comprises a tank body, a bracket and a controller, wherein the tank body is mounted on the bracket; the tank body is wrapped with a heat insulating water jacket; the heat insulating jacket is provided with a water inlet and a water outlet; the upper portion of the tank body is provided with a steam inlet pipe for pumping steam in, an automatic feeding inlet, a discharging outlet, and a detection port for allowing a pressure transmitter to be inserted in; the discharging outlet of the tank body is connected with a discharging system pipe; the tank body is provided with a stirring device; stirring blades of the stirring device extends into an inner cavity of the tank body;and the tank body is provided with a plurality of transparent observation windows. The control method comprises the steps that the tank body is cleaned, a self-control valve, a sewage valve and the observation windows are closed, and control parameters are set on a human-computer interaction interface of the controller; feeding is conducted; intermittent stirring and tank body constant temperaturecontrol are conducted according to the set parameters. The glass fiber chemical raw material storage tank and the control method thereof have the beneficial effects that the storage environment and use stability of chemical raw materials such as sizing agents for glass fiber production are improved, and the use efficiency is improved.