This disclosure provides a package substrate and its fabrication method. The package substrate includes: a dielectric body; a first circuit device disposed in the dielectric body, the first circuit device comprising a first terminal and a second terminal at a top of the first circuit device; a second circuit device disposed in the dielectric body, the second circuit device comprising a third terminal at a top of the second circuit device; a first conductive pillar formed in the dielectric body and connected to the first terminal; a first bonding wire connecting the second terminal and the third terminal; and a redistribution layer comprising a first conductive wire formed on the dielectric body, the conductive wire connected to the first conductive pillar.