The invention discloses a liquid crystal injection method, comprising the following steps of: step a, closing the cabin door of a liquid crystal injection machine when a liquid crystal container is filled with liquid crystal, and then implementing step b, wherein the liquid crystal container is arranged on a base within a cavity of the liquid crystal injection machine, the liquid crystal container is equipped, in an insertion manner, with a liquid crystal heater controlled by an electric control system and a liquid crystal temperature controller which is used for feeding back liquid crystal temperature collected in real time to the electric control system to form a closed loop control; step b, removing air from the liquid crystal, then opening the cabin door and implementing step c; and step c, placing a roasted display panel on a bracket which is arranged within the cavity, and then closing the cabin door to complete the steps for injecting liquid crystal into the display panel. The liquid crystal injection method provided by the invention has the advantages that the heating structure of the liquid crystal container is simple and practical, the temperature of the liquid crystal can be accurately monitored, the viscosity of the liquid crystal is reduced to the largest extent while preventing the volatilization of low-boiling point component in the liquid crystal, and the consumption of the liquid crystal and the rejection rate of the product are reduced.