Abstract: Fusion-fission hybrid reactor in a long term energy resource strategy is described briefly.Capability of electricity and fissionable material production of a hybrid reactor consisted of typical fusion reactor core and blanket is analyzed emphatically.Capability of electricity production of composite fuel cycle system of hybrid and satellite reactors (e.g.PWR) is studied.Related calculations show that a natural uranium fueled and water cooled blanket is economical and less technical risk.