Left edge sealing corner sectional material

The utility model discloses a left edge sealing corner sectional material. The left edge sealing corner sectional material comprises an upper transverse plate and is characterized in that the left end and the right end of the upper transverse plate are provided with a left outer protective plate and a right outer protective plate, an arc-shaped buckling plate is fixedly installed at the left end of the upper transverse plate through a bolt, an elbow-board is clamped in the arc-shaped buckling plate, a perpendicular vertical plate is fixedly installed at the lower end of the elbow-board through a bolt, and a sealing baffle is arranged on the side wall of the vertical plate. The left edge sealing corner sectional material is simple in structure, convenient to assemble and firm in clamping connection.