The invention discloses a high-capacity silicon carbon negative electrode material, and a preparation method and applications thereof. According to the preparation method, ball milling, surfactant treatment, ultrasonic wave treatment, spray drying, and the like are adopted, and related technological parameters are optimized for effective dispersion and combination of nanometer silicon and a carbonmaterial to prepare the silicon carbon composite material with a high specific capacity ranging from 1000 to 1700mAh / g and long cycle life. The preparation method is simple; cost is low; industrialized production is convenient to realize; and the silicon carbon composite material high in specific capacity and long in cycle life is prepared through ball milling, surfactant treatment, ultrasonic wave treatment, spray drying, and the like, and based on optimized related technological parameters.