Objective　To explore anatomic difference of the asymptomatic flatfoot and normal foot of the young female, and characterize the relationship of plantar pressure and plantar arch form.　Methods　Using Zebris-system, the static and dynamic plantar pressures of normal feet (twelve cases) and flat feet (twelve cases) were measured, as well, the lateral X-ray projection of the two groups under the weight bearing and non-weight bearing conditions were used to test the plantar arch shape, followed by the statistical analysis. Results　When standing upright with double feet, there was no significant difference of the plantar pressure between the flat feet and normal feet (P>0.05). When standing upright with single foot, the weighting proportion of fore foot of flatfoot group was significantly increased than that of the normal-foot group. In walking stance, the central movement trajectory of the plantar pressure between the flatfoot group and normal-foot group was obviously different. There was significant difference of each parameter of plantar arch form between the weight-bearing and non-weight bearing position of the flatfoot group (P<0.05), and between the weight bearing position of flatfoot group and that of normal-foot group (P<0.05).　Conclusions　In walking and uniped standing conditions, the plantar pressure and plantar arch form between asymptomatic flatfoot and normal foot are obviously different. That may provide the quantitative data for evaluating and diagnosing the asymptomatic flatfoot.