A kind of protective device of cabbage vegetable, the support unit and one being arranged on what ground comprising one, which cover, covers canopy unit on the what support unit. The support unit plants region to accommodate the plant of plural cabbage vegetable around out one. It includes one covering to cover the cover part that region is planted in the plant on the what support unit, and at least one removedly by the fixing piece on the fixed what ground of the cover part that this, which covers canopy unit,. The grade cabbage vegetables are covered to completely cut off insect pest by the cover part, make grower that need not in addition apply pesticide, and cover on the fixed what ground of the cover part without lifting because of wind waved through the fixing piece.一種甘藍類蔬菜的防護裝置，包含一設置於地面上的支撐單元，及一覆設於該支撐單元上的覆棚單元。該支撐單元圍繞出一用以容置複數甘藍類蔬菜的植栽區域。該覆棚單元包括一覆設於該支撐單元上以罩覆該植栽區域的罩覆件，及至少一可移除地將該罩覆件固定於地面的固定件。藉由該罩覆件將該等甘藍類蔬菜罩覆以隔絕蟲害，使種植者不必另外施加農藥，並透過該固定件將該罩覆件固定於地面而不會因風吹拂而掀覆。
