In light of the tendency of transient supervised data in a power system toward massive development and the pressure brought about on various serial programming analysis software， a massive common format for transient data exchange（COMTRADE） data parallel parsing algorithm based on the multi-core and pipeline design idea is studied. For the parallel parsing algorithm in the binary data format， two phases are adopted， the first is for file reading and the second， multi-thread parsing. For the parallel load algorithm in the ASCII format， three phases are adopted， the first and second phase are the same as the binary data format， the third is for block edge data parsing， which subverts the traditional serial parsing algorithm of the ASCII text. In the algorithm presented， the sequence number that is overlooked in the past is effectively used in the COMTRADE data file， greatly improving the degree of parallelism. Test results show that a fairly high acceleration ratio can be achieved using the algorithm presented， while the linear acceleration ratio can be obtained with an increase of the core number and COMTRADE data.