The present invention discloses a protection device for high-rise greening, including a fixing member and a rattan net. A hollow pipe is mounted inside the fixing member, a lower portion of the hollow pipe is provided with a thread section, a side portion of the hollow pipe 5 is provided with an arc plate, and an upper portion of the hollow pipe is fixedly connected to a baffle plate. A side portion of the baffle plate is provided with a through hole. An upper portion of the fixing member is connected to the rattan net in a clamping way, and a lower portion of the fixing member is connected to a planting box in a thread connection way. A side of the arc plate is connected to a bottom of the planting box through screws, and a sealing 10 gasket is provided between the planting box and each screw. A side portion of the rattan net is mounted with a convex plate. Through structures such as the fixing member, the hollow pipe, the arc plate, etc., under the action of screws, the arc plate moves to fix the root of the plant. Through the rattan net and the convex plate, the growth of the plant is adjusted and limited, plants planted on the upper stories are protected and limited simply and conveniently, and the 15 growth of the plant is guided, which ensures the plant growth meets the demands of users.