To investigate the influence of age on plantar pressure in normal people during level walking, ground reaction force data from 20 normal people of different age were collected by the employment of Three-Dimensional force platform system, and the force data in anterior-posterior, medio-lateral and vertical directions were normalized and transformed into force-time curves. The characteristic parameters were selected and analyzed by using statistical methods. The plantar pressure in normal people of different age was comparatively analyzed. Results show that a certain degree of difference was found in the plantar pressure distribution in normal people of different age during level walking: for the old group, the time parameters of gait in vertical and anterior-posterior direction came earlier than those in the young group. It may be due to the fact that the step length of the old person is smaller than that of the young person and the center of gravity of the body crossing the hip appears earlier in the old group than in the young group.
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