The present invention provides a method for encapsulating chlorine dioxide including preparing an aqueous solution of chlorine dioxide, preparing an encapsulating suspension, and adding the aqueous solution of chlorine dioxide into the encapsulating suspension under a temperature of 0-30 ℃ for encapsulating chlorine dioxide molecules by the encapsulating reagent. The encapsulating suspension includes an encapsulating reagent. The encapsulating reagent is a particle of silicon dioxide, titanium dioxide, hectorite or sodium magnesium silicate. As such, chlorine dioxide can be efficiently encapsulated, thus reducing diffusion rate of chlorine dioxide.一種二氧化氯的包覆方法,係包含:提供一二氧化氯水溶液;提供一包覆劑分散液,該包覆劑分散液係包含一包覆劑,且該包覆劑係一二氧化矽粒子、一二氧化鈦粒子、一鋰蒙脫石粒子或一矽酸鎂鈉粒子;及於0~30℃之條件下,將該二氧化氯水溶液加入該包覆劑分散液,使二氧化氯分子被包覆劑所包覆。藉由本發明之二氧化氯的包覆方法,可有效地包覆二氧化氯,以降低二氧化氯分子的逸散速度。
