The invention relates to a liquid crystal injection head for injecting liquid crystal and controlling the injection amount of the liquid crystal. The liquid crystal injection head comprises an inner guide sheath including a first central hole for guiding liquid crystal, and a thimble movably arranged in the extension direction of the first central hole of the inner guide sheath and froming clearance fit with the first central hole for controlling the flow rate of the liquid crystal flowing in the first central hole, wherein the thimble and the inner guide sheath are made of an insulation material. The liquid crystal injection head including the thimble and the inner guide sheath made of the insulation material can obviate the short circuit problem due to particulate contamination, thus greatly improving the process quality of a liquid crystal panel.