The invention discloses a substation equipment state evaluation weight correction method based on multiple linear regression. The method includes 1, allowing an expert to judge according to experience and the related data, and giving a substation equipment point deduct value result under the comprehensive suggestions; 2, establishing vectors and matrix required by regression according to the recently scoring system state evaluation data and the substation equipment point deduct value result, and establishing a multiple linear regression model of quality states; 3, calculating a regression correction coefficient according to the multiple linear regression model to serve as a theoretical correction weight value; 4, performing result analysis according to the theoretical regression correction coefficient, and acquiring a final state evaluation weight value. The invention further discloses a substation equipment state evaluation weight correction system based on the multiple linear regression. The substation equipment evaluation weight is corrected through the multiple linear regression model, and the accuracy of the coring system state evaluation is improved.