A kind of stand-type x ray machine fall prevention device, main system include a frame body, a protecting band and two fixing belts. Wherein, which is equipped with two straight-bars, and sets the cross bar of two straight-bar apical margin of what, and what straight-bar is equipped with the latch closure being alternatively arranged; The protecting band system what is respectively equipped with ring at both ends, and extends the bandage for being equipped with fastener by both ends; Two fixing belts system's what both ends are respectively equipped with hook. The waist of x light sufferer is irradiated in order to protecting band bondage what need to stand, the hook of two fixing belts is hooked to the ring of the latch closure and protecting band of holding what frame body straight-bar respectively again, to constitute the support to sufferer, it prevents sufferer from causing injury of falling because that can not stand long or physical strength is weak, and then ensures safety when sufferer is examined.一種站立式x光機預防跌倒裝置,主要係包含一架體、一護帶及兩固定帶。其中,該架體係設有兩直桿,以及置於兩直桿頂緣之橫桿,於直桿設有間隔排列之環扣;該護帶係於鄰近兩端處分別設有環圈,並由兩端延伸設有扣具之綁帶;該兩固定帶係於兩端分別設有卡勾。俾將護帶綁縛於需站立照射x光病患之腰部,再將兩固定帶之卡勾分別勾持於架體直桿之環扣以及護帶之環圈,以構成對病患之支撐,防止病患因無法久站或體力虛弱而造成跌倒受傷,進而保障病患受檢時之安全。