Abstract: Fractional molecular weight of linear low density polyethylene DFDC7050 was analysed. Property of DFDC9088 was determined according to the requirement of high quality greenhouse films. The molecular weight distribution was controlled through the adjustment of the production process.Best antioxidation additive formula was chosen.The result showed that the DFDC9088 had good processing ability and optical performance.Practical application and Xenon lamp artificial accelerated experiments proved that DFDC9088 was a kind of high quality greenhouse films.