The invention provides a circuit pin positioning structure, a fabrication method of soldered circuit elements and a method of forming circuit pins of a stacked package, applicable to a semiconductor package structure. A positioning rack and a plurality of conductor elements are used. A plurality of positioning holes are provided on a bottom surface of the positioning rack to form a conductor positioning area, and an operational portion is formed on an opposing surface away from the conductor positioning area, for being mounted with pick and place equipment. The conductor elements are positioned in the positioning holes. When the pick and place equipment loads and moves the positioning rack to preformed circuit contacts of the stacked package, the conductor elements are soldered to the preformed circuit contacts and then the positioning rack is removed.