The invention relates to a preparation method of a silicon carbon negative electrode material. The method is characterized in that ionic liquid or a mixture of the ionic liquid and other organic matters is employed as a carbon source, and a silicon material is subjected to high-temperature pyrolytic carbon coating. The anions of the used ionic liquid are fluo anions. The invention also comprises the silicon carbon negative electrode material prepared by the above preparation method and an application of the silicon carbon negative electrode material in preparation of a lithium battery. The preparation method is simple, and can effectively increase the cycling performance of the silicon carbon negative electrode material.