|（School of Physical Education，Soochow University，Suzhou 215006，China）
Abstract: It is difficult for quantified indexes to reflect the event specific degree of sports training. These indexes themselves are with errors, lagged and one-sided. Scientific training should not completely depend on quantified indexes. For scientific training, index quantification and principle deepening are mutually supplemented. Scientiza-tion contains quantification and principle deepening intrinsically, being the advanced stage of development of quan-tification and principle deepening.
Key words: scientific training；quantified indexes；training princip