Currently， steam plasma gasification system for recycling of I waste polymers has been technologically advanced at HNU， that is a environmentally friendly and simple processes converting waste polymeric materials to commercially valuable raw material so-called synthetic gas for fuel or petroleum chemical industry. By using steam plasma gasification system， PE as a model compound has been completely decomposed and converted t이 low molecular weight gases， that have been dominantly a carbon monoxide and hydrogen πhe yields of valuable gas products by gasification increased with increasing of the temperature in secondary gasification reactor and with decreasing of steam-PE ratio. Product gases have þeen obtained the 65% of H₂ and 30% of CO under the condition of steam-PE ratio of 1.2 and temperature of 1200'C in second gasification reactor, respectively.