Abstract: Unsmoothed bionics design for screw pile blades was brought forward according to the resistance reduction characteristics of typical soil animals. To study the resistance-reducing effects of bionic surface on blades of screw piles for preventing flood and rushing to deal with an emergency, experiments of trolley were designed firstly, including an orthogonal experiment for wave plate and the contrast between unsmoothed wave plate and smoothed plate. Then contrast experiments of the bionic screw pile and the common one were done. The experiments of trolley results show, within the experimental factor levels, the width of unsmoothed wave plate protruding part affects the resistance-reducing effects notably, and the resistance-reducing effects become better with the increase of the width. The results of contrast experiments of the bionic screw pile and the common one show that bionic screw piles can reduce resistance to soils.