The characteristic of the integrated impeller blade structure and its failure mode is presented.A method for integrated impeller blade resonance reliability analysis based on forced vibration magnifying factor model combined with sensitivity analysis of natural frequency is proposed.Fatal resonance and forced vibration can be avoided by controlling the magnifying factor of forced vibration

and by controlling the natural frequency which is affected by the thickness of the integrated impeller blade.Finally

an example is presented.Compared with succedent test result

it shows that the method presented here is effective.