This paper was to review literatures which described how arch support insoles influenced people with flatfeet. The review collected literatures published between January 1986 and December 2015 which discussed effects of flat feet with arch support on injuries and fatigue and then summarized and sorted their findings. The most disussed variables in those literatures were injury and followed by fatigue. In this review, we attributed lower extremity injuries and fatigue on people with flatfeet to the lack of plantar arch support. Wearing the arch support insoles could reduce the midfoot pressure, improve issue of low extremity.