The utility model relates to a greening device, particularly a device hanging earth on one side slope without earth. The utility model comprises a supporting post (1), a transversal net frame (2), a net (3) and a longitudinal reinforcing rib (4), wherein the upper segment of the supporting post and the transversal net frame are fixedly connected into a net frame segment (5), and the lower segment is an implanted segment (6). The multi-row transversal net frames which are arranged in parallel and the net form a whole. The utility model has the advantages of firm structure, convenient installation, good anti-soil erosion effect and low cost. The utility model is suitable to be installed and used on the slope surfaces of side slopes without earth, such as a rock side slope, a spray concrete support side slope and a cement laid stone protecting face side slope. The greening device prevents the soil from losing, which realizes the planting of flowers and grass on side slopes without earth to achieve the purpose of protecting and beautifying environment.