The invention relates to a glass magnesium keel. The glass magnesium keel is characterized in that the glass magnesium keel is of a rectangular long-strip-shaped structure made of a glass magnesium material, and comprises two long faces, two transverse faces and two side faces; the long faces and the side faces are connected, the connecting corners of the long faces and the side faces are at 90 degrees, and the long faces and the side faces constitute the transverse faces at the transverse sections; and the connecting corners of the transverse faces and the long faces are at 90 degrees, the connecting corners of the transverse faces and the side faces are at 90 degrees, the lengths of the long faces and the side faces are 2000-3000 mm, the widths of the long faces are 45-80 mm, the widthsof the side faces are 22-48 mm, and the areas of the transverse faces are the product of 45-80 mm and 22-48 mm. The novel glass magnesium keel has the beneficial effects that the advantages of fireproofing and high product toughness are achieved, and the quality and property of a product are improved.