Falling prevention safety belt device

The invention discloses a falling prevention safety belt device. The falling prevention safety belt device comprises a sling, a disconnection prevention tensioning hook and a chest safety belt. One end of the sling is connected with the disconnection prevention tensioning hook, and the other end of the sling is connected with the chest safety belt. The disconnection prevention tensioning hook comprises an inverted-U-shaped fixing frame and an arc-shaped movable clamping rod. The whole inverted-U-shaped fixing frame is in an inverted-L shape, and the hollow whole is formed by connecting a lower straight rod and an upper straight rod. One end of the arc-shaped movable clamping rod is an annular end, and the other end of the arc-shaped movable clamping rod is a free end. The lower straight rod of the inverted-U-shaped fixing frame is sleeved with the annular end of the arc-shaped movable clamping rod. The free end of the arc-shaped movable clamping rod rotates with the annular end as the center in the inverted-U