The invention discloses an oil paper insulation aging state evaluation method and system based on activation energy iterative correction. By utilizing an iterative algorithm, activation energy is continuously corrected in an oil paper insulation aging state evaluation iteration process, so that the activation energy error is reduced and the accuracy of a temperature normalization process is improved. The method comprises the steps of carrying out temperature normalization processing on a frequency domain dielectric spectral curve of tested oil paper insulation equipment by utilizing an Arrhenius equation; carrying out curve fitting on the frequency domain dielectric spectral curve subjected to the temperature normalization processing and an H-N model to obtain characteristic parameters tau, alpha and beta of the H-N model; and matching the characteristic parameters with a database of oil paper insulation H-N models with different aging states to determine an oil paper insulation agingstate. An evaluation result has relatively high accuracy and reliability.