The vector dynamics of solitons are crucial but easily neglected for realizing vortex solitons.In this Letter,we investigate the effect of vector dynamics on cylindrical vector beams[CVBs]implementation and propose a novel technical method to realize femtosecond CVBs based on vector-locked solitons,which are presented as group-velocity-locked vector solitons[GVLVSs]in the experiment.The outstanding vector properties of GVLVSs not only greatly improve the efficiency of solitons converted into CVBs and output power of CVBs[2.4 times and 4.1 times that of scalar solitons and vector change periodical solitons,with the purity of 97.2％],but also relax the obstacle of ultrafast CVBs from the fundamental frequency to the harmonic regime[up to 198 MHz]for the first time,to the best of our knowledge.This is the highest repetition rate reported for ultrafast CVBs based on passive mode-locking.The investigation of the influence of solitons vector dynamics evolution on the realization of CVBs provides guidance for the excellent performance of ultrafast CVBs.