The artificial plant water retaining device comprises at least one basin body and an upper cover corresponding to the basin body, the basin body opening has a first accommodating space facing upwardly, and the first accommodating space top edge ring is provided with an engaging lip and an upper cover The second accommodating space has a second accommodating space, and the second accommodating space bottom edge ring is provided with a sealing portion that engages with the engaging lip, and the upper cover covers the first accommodating space and the second accommodating space The accommodating spaces are closely connected, and an opening is provided at the top of the upper cover for plant insertion. The first accommodating space can be used for storing planting water, and the second accommodating space can provide shaking and splashing space of the planting water when the plant water retainer is shaken or tilted, so as to effectively prevent the loss of plant water and reduce at the same time The risk of planting being broken.本創作植栽保水器，包含至少一盆體以及一與該盆體對應的上蓋，盆體開口朝上內部具有第一容置空間，該第一容置空間頂部邊緣環設有一接合唇，上蓋開口朝下內部具有第二容置空間，該第二容置空間底部邊緣環設有一與該接合唇接合的密合部，該上蓋蓋合於該盆體後該第一容置空間與第二容置空間緊密相連，且該上蓋頂部設有一開孔可供植栽插入。該第一容置空間可供儲存植栽用水，該第二容置空間可提供植栽保水器搖晃或傾斜時植栽用水的晃動及噴濺空間，以有效防止植栽用水流失，並同時降低植栽被折斷的風險。
