The invention discloses a manufacturing method of a pole piece and an electric core, and the electric core and the pole piece for a winding battery. The coating area of the pole piece is divided into multiple segments in turn from the starting point to the end point, and the length of each segment satisfies the formula: LN=L0+(N‑1)*π*(d1+d2+2*d3)*( 1+K) or LN=L0+N*π*(d1+d2+2*d3)*(1+K), where N: the serial number of the segment counted from the beginning of the coating area, the starting value is 1, L0: the inner circumference of the needle, d1: the thickness of the positive electrode, d2: the thickness of the negative electrode, d3: the thickness of the separator, K: the correction factor; one side of any adjacent segment is provided with the The tab area is formed by a tab with the same length as the segment at the first segment, and a vacant area with the same length as the segment is formed at the other side, and the tab area and the vacant area are located on the same side of the coating area. In this way, after the positive and negative pole pieces are wound into battery cores from the starting point, the lugs of each pole piece will be concentrated on one side of the end face of the battery core in a diameter direction, so that the battery cores can go out from one side of the end face.