The present application relates to the field of energy storage devices and, in particular, relates to a battery electrode, and a secondary battery using the battery electrode. The battery electrode comprises an electrode tab, a current collector, and a diaphragm attached onto at least one surface of the current collector, wherein the diaphragm is provided with a groove, the electrode tab is embedded into the groove and is electrically connected with the current collector, the electrode tab comprises an embedded portion embedded in the groove and an exposed portion protruded outside the groove; wherein an upper surface of the embedded portion is covered with an active material coating layer. According to the present application, an embedded electrode tab is adopted, and a diaphragm covers a surface of an embedded portion.