Disclosed are a negative electrode plate and a lithium-ion battery including the negative electrode plate. The negative electrode plate of the present disclosure includes a current collector, a negative electrode active layer arranged on at least one functional surface of the current collector, and a lithium source; and the negative electrode active layer includes a negative electrode active material and a polymer, the polymer includes a first structural unit, the first structural unit is selected from an olefin compound containing a substituted or unsubstituted ureido group, and the olefin compound includes at least one cyclic group. The negative electrode plate of the present disclosure can effectively supplement a lithium loss of the lithium-ion battery in an application process, so that initial charge/discharge efficiency and cycling performance of the lithium-ion battery are improved.