Abstract: Targeting the calculation efficiency,accuracy and convergence of continuous power flow method for voltage stability analysis,this paper proposes an improved continuous power flow method. In the parameterization,this method combines the advantages of physical parameterization and local parameters in different regions. A new prediction-correction method is introduced in the correction process. In step size control,the proposed variable step size control function can adjust the step size. The calculation accuracy,efficiency and convergence of the method is greatly improved. Finally,the effectiveness of the method is verified through an case,and the efficiency of the continuous power flow method in analyzing the voltage stability is improved.