Abstract: Studied on effect and applied method of potassium permanganate ,calcareousness lime or plant ash and compost for control Plasmodiophora brassica . The result shown that potassium permanganate , calcareousness lime and compost were plant protect material for control Plasmodiophora brassica,The result were affected by different applying period and applying method . Calcareousness lime and plant ash could control this disease applied only, the optimum applying method is mix potassium permanganate with calcareousness lime base on compost in different plant period in growing season..