Chinese cabbage clubroot is also called big root disease and mainly harms the Brassicaceae family. Implementing flood-drought rotation or crop rotation with crops outside the host range for 4 to 5 years can effectively reduce the disease; applying more lime and adjusting soil acidity can reduce the disease; pesticide control uses pentachloronitrobenzene, carbendazim, thiophanate, and benzene Chemicals such as Laite and Captan are applied in holes or ditches, or the roots are dipped in medicinal liquid or medicinal mud, which has a better control effect. Usually, 75% pentachloronitrobenzene is applied in holes or strips (22.5-45 kg/ha) or 700-1,000 times of solution (0.25-0.5 kg/hole) is applied in a shower. The remaining chemicals are used according to the instructions.