Gait analysis has always been used for the research in the fields of orthopedics, rehabilitation engineering, and biomechanics. Shown from past research, there is no research using parametric analysis during a continuous gait cycle. Therefore, through Gaitway TM, the main purpose of this research was to collect kinetic data on school children using different percentage loads on the loading carriage, and discuss the changes of gait parameters, and proper research percentage loads. The subjects used were ten school boy children. Their mean average height and weight were 144.4±6.55cm、39.4± 7.79kg. During the testing process, every subject was randomly tested using six different percentage loads (0%, 7.5%, 10%, 12.5%, 15% and 20%). A force plate measured the data. Bio Ware was used to collect the data pertaining to gait parameters. The results using six different percentage loads on school children measuring time and force showed no significant difference. However, the research can provide some valuable information in determining factors related to cadence, the leg support time, and the total support impulse. The research found a phenomenon that at 15% there is a conspicuous tendency for change. Therefore, at a 15% load we can determine a proper percentage clinical load.