A kind of ultralow Cribguard device includes base unit, a sliding seat unit, a fence unit and the buckle unit below an installation what bedstead. Base unit includes the guide rail at two preceding Hou intervals. Sliding seat unit be can left and right displacement across setting the what grade guide rails. Fence unit is the what sliding seat unit that is pivoted, and can be changed between a gear shield position, a bottom position and a reception position. Fence unit can be positioned what gear shield position by buckling unit. It is designed through the structure of base unit, sliding seat unit, fence unit and buckle unit, so that the fence unit bottom is to bottom position Hou, it can directly elapse below storage to bedstead, user will not be interfered to leave the bed completely, bedstead side space will not be occupied, it is a kind of innovation and convenient and practical guard bar device design so the ultralow bed of what low clearance can be used.一種超低床護欄裝置，包含一安裝於床架下方的基座單元、一滑動座單元、一護欄單元及一卡扣單元。基座單元包括兩個前後間隔之導軌。滑動座單元是可左右位移地跨設於該等導軌。護欄單元是樞設於滑動座單元，可在一擋護位置、一下擺位置，及一收納位置間變化。卡扣單元可將護欄單元定位於擋護位置。透過基座單元、滑動座單元、護欄單元與卡扣單元之結構設計，使得護欄單元下擺至下擺位置後，即可直接推移收納至床架下方，完全不會妨礙使用者下床，也不會佔據床架側邊空間，所以可用於低高度的超低床，是一種創新且方便實用的護欄裝置設計。
