The invention belongs to the field of electrochemistry, and relates to a high-stability silicon-carbon negative electrode material for lithium batteries and a method for preparing the high-stability silicon-carbon negative electrode material. The method includes steps of (1), sufficiently mixing nanometer silicon and substrate carbon materials with one another at the normal temperature to obtain raw materials A; (2), mechanically smashing granular petroleum pitch or coal pitch to obtain pitch powder used as a raw material B; (3), sufficiently mixing the raw materials A, the raw material B, carbon nanometer tubes and hard carbon precursors with one another to obtain raw materials C; (4), softening the raw materials C under the protection of gas at the low temperatures, preliminarily coatingthe raw materials C under the protection of the gas at the low temperatures, smashing bulky substances obtained after cooling is carried out, and carrying out screening to obtain raw materials D; (5), uniformly mixing the raw materials D and the raw material B with one another at the normal temperature, carrying out high-temperature agglomeration under the protection of gas and smashing and screening obtained blocky substances to ultimately obtain the high-stability silicon-carbon negative electrode material. The high-stability silicon-carbon negative electrode material and the method have the advantages that processes are simple and are high in safety, the high-stability silicon-carbon negative electrode material prepared by the aid of the method is high in primary effect and excellent in stability and rate performance, the high-stability silicon-carbon negative electrode material and the method are suitable for industrial production, and the like.