The utility model provides a corner protection binding-off bar for a floor platform. The corner protecting and opening-closing bar is a strip-shaped decorative type molded and pressed through an alloy or engineering plastics and comprises a transverse plate and a vertical plate which are vertically connected with each other. The radial section of the corner protecting and opening-closing bar is of the shape of the Arabic numeral 'seven', and the outer surface of the connection corner is of an arc-shaped surface. The two free ends of the transverse plate and the vertical plate binds off an opening for an incline or an arc surface through the transition by means of facing the inner side, and the free end of the vertical plate also bends and protrudes towards the inner side. The transverse plate is provided with a plurality of installation holes. The corner protection closure bar is a decorative sectional material for trimming and servicing sharp edges and corners of a wood floor. The corner protection closure bar is conveniently to be installed, and has beautiful appearance and good installation effect.