The invention relates to the field of power systems and discloses an object-oriented PSD-SCCP500kV main transformer branch short-circuit current analysis method. The method includes: 1), realizing intelligent recognition of buses on a high-voltage side and a medium-voltage side of a 500kV substation in a specified area; 2), completing batch computing of main transformer branch short-circuit current; 3), extracting short-circuit current values of the high-voltage side and the medium-voltage side of a main transformer from short-circuit current computing results; 4), automatically generating a 500kV main transformer branch short-circuit current computing result table. By adopting an object-oriented program designing method, a batch computing function of branch short-circuit current on the high-voltage side and the medium-voltage side of the 500kV main transformer is realized, and automatic analysis of a computing result file set is completed; the problem that artificial analysis of characteristic value information one by one is high in workload and prone to errors is avoided, working efficiency is improved greatly, accuracy of PSD-SCCP data analysis is enhanced, and efficiency of PSD-SCCP data analysis is improved.