A method for manufacturing a circuit board for a semiconductor package is proposed. The method includes providing a circuit board having a circuit layer formed on at least one surface thereof, wherein the circuit board is defined with at least one predetermined area, the circuit layer includes a plurality of electrically conductive pads and conductive wires for electroplating and being connected with the electrically conductive pads, the conductive wires are formed within the predetermined area, and a metal protecting layer formed to cover the electrically conductive pads and the conductive wires; removing the portion of the metal protecting layer and the conductive wires covered by the portion of the metal protecting layer to electrically disconnect the electrically conductive pads from the conductive wires; and removing the predetermined area to form a through hole in the circuit board. Thus, formation of burrs in the metal protecting layer can be prevented after formation of the through hole.