Structural efficiency evaluation method was employed and improved in structural design of high-load mixed-flow compressor to meet the strict requirements and to optimize the bladed disk structure.Two novel structure schemes were put forward named type “C” and type “M” to increase the structural efficiency.The key items including average stress

vibration robust coefficient and rim deformation coordination coefficient were calculated

and structural efficiency coefficient was studied and evaluated contrastively.Finally

the advantages of the novel structure schemes are proved including low weight

high reliability and low loss at blade tips.The calculation result shows the “M” structure scheme could result in that 24.7% increase in average stress

20% decreasing in mass

37.9% decreasing in vibration response and 67.6% decreasing in rim deformation.