The present invention provides a susceptor power-interface assembly which is used for a chamber process module that includes a power supply, a process chamber and a susceptor, wherein the susceptor includes a susceptor shaft penetrating a bottom of the process chamber and a susceptor base on which a wafer is disposed for the process. The susceptor power-interface assembly electrically connects the power supply to the susceptor base. For the electrical-connection between the power supply to the suceptor base, the susceptor power-interface assembly includes a first flange at the end of the susceptor shaft, the first flange bent outside from the susceptor shaft; a second flange having a circular shape, the second flange coupled with the first flange using screws; a plurality of connectors penetrating the second flange, wherein one part of each connector is disposed on the inner surface of the second flange and electrically connected to the susceptor base, wherein the other part of each connector is disposed on the outer surface of the second flange; and a plurality of power boots each having a hole so as to cap each connector disposed on the outer surface of the second flange, wherein each connector slide into the hole of each power boot to be coupled with the power boot. The susceptor power-interface assembly further includes an O-ring packing that is interposed between the first and second flanges and made of Teflon.