This invention relates to the application of silicon dioxide ultrafine powder, which is amorphous silicon dioxide ultrafine powder prepared by grain husk and straw, and which can be used for curing cervicitis.本發明係關於一種二氧化矽超微粉末之用途,其中該二氧化矽超微粉末係為利用穀殼、稻草製備所得之無定型二氧化矽超微粉末,並該二氧化矽超微粉末係可用於製備治療子宮頸炎之藥物的用途。