The invention relates to a preparation of solid stabilized dioxide peroxide sterilization sanitizer consists of chlorite takes 0.1 percents to 65 percents weight, mixture of anhydrous calcium chloride and anhydrous sodium chloride takes 1 percents to 90 percents weight, activator includes boracic acid, acid sulfate and tartaric acid takes 5 percents to 75 percents weight,. Prepare by below steps: dry each agent; first put anhydrous calcium chloride into the mixing device, second the chlorite, third the anhydrous sodium sulfate and mix them up together or first the mixture of anhydrous calcium chloride and anhydrous sodium chloride, then solid chlorite, last mix up tartaric acid, boracic acid and acid sulfate in the device; seal and pack the mixed material as the product. The product is safe, easy to transport, of high using effect, broadly generalized, low poison, non-erode, no irritant gas, can be applied in sterilizing and disinfecting in house, hospital, restaurant and other places.