Protective device is planted in a plant, is suitable for placement on a soil and is protected a plant. The protective device includes a protective unit, and the protective unit is mounted on the support on the soil with not move mode and consolidates unit by one, the protective unit, which is defined with a base ring wall, one by the base ring wall, to be formed and around the annular room of the plant and position what annular room top and the confining wall for blocking the annular room. Hold the block media that indoor placement can be close to avoid creeping property animal using the annular in the protective unit； and it is covered using the confining wall in the top of the annular room； gastropod and insect can be effectively prevented close to the plant, and reach the purpose of protection plant.一種植栽防護裝置，適合安置在一土壤上並保護一植物。該防護裝置包含一個防護單元，以及一個將該防護單元以不移動方式安裝在該土壤上的撐固單元，該防護單元具有一個底環壁、一個由該底環壁界定而成並圍繞該植物的環形容室，以及一個位於該環形容室上方並遮擋該環形容室的擋圍壁。利用在該防護單元之環形容室內擺放可以避免爬行性動物接近的阻擋介質，並且利用該擋圍壁遮蓋在該環形容室的上方，可以有效地防止腹足類動物及昆蟲接近該植物，並達到保護植物之目的。
