Abstract: Effects of solid-to-liquid ratio, pH, extraction time and temperature on taro starch extraction ratio and tincture were investigated using sodium hyroxide solution as extraction reagent, and the taro starch characteristic was studied.The results showed that the optimal conditions for taro starch extraction as follows:pH10.0, extraction time 80min, extraction temperature 25℃, ratio of sample to water 1:3.The extraction rate could achieve 84.82% by this processing.And the whiteness of starch could achieve 94.11.It was much better than other common starches.Starch characteristic research showed that the volume average size of taro starch in the following 10μm, d (0.5) for 14.6μm, slightly more than 10μm.Compared with other starch, taro starch had excellent thermal stability, cold stability, gel strength and condensed characteristics.