Based on 1-D aerodynamic design, weight estimation models for high pressure compressor blade and fan blade were established separately in view of the characteristics of civil turbofan engine with large bypass ratio.Simplified structure, equivalent thickness and aerodynamic correction coefficient were used to establish weight estimation model for high pressure compressor blade based on statistic analysis. Simplified structure in subsection,chord and max thickness matching were used to establish weight estimation model for fan blades based on statistic analysis.