Negative electrode and secondary battery

The present invention relates to a negative electrode for a secondary battery and a secondary battery comprising the same, the negative electrode comprising: a current collector; the first negative electrode active material layer is arranged on the current collector; and a second negative electrode active material layer disposed on the first negative electrode active material layer, in which the first negative electrode active material layer and the second negative electrode active material layer include a silicon-based active material and natural graphite, the natural graphite having an average particle diameter (D50) of 10 [mu] m or less, and the OI (004/110) of the first negative electrode active material layer and the second negative electrode active material layer is 8 or less. 本发明涉及一种二次电池用负极以及包括该负极的二次电池，所述负极包括：集流体；设置在所述集流体上的第一负极活性材料层；以及设置在所述第一负极活性材料层上的第二负极活性材料层，其中所述第一负极活性材料层和所述第二负极活性材料层包含硅基活性材料和天然石墨，所述天然石墨的平均粒径(D50)为10μm以下，并且所述第一负极活性材料层和所述第二负极活性材料层的OI(004/110)为8以下。