This disclosure provides a package substrate and its fabrication method. The package substrate includes: a molding compound body; a first circuit device disposed in the molding compound body, the first circuit device having a first terminal at a top of the first circuit device; a first conductive via formed in the molding compound body and connected to the first terminal; a second circuit device disposed in the molding compound body, the second circuit device having a second terminal at a top of the second circuit device; a second conductive via formed in the molding compound body and connected to the second terminal; and a redistribution layer with a conductive wire formed on the molding compound body, the conductive wire connecting the first conductive via and the second conductive via; wherein the first and second terminals are respectively located at different depths of the molding compound body.