The utility model discloses a heat insulation strip which comprises a heat insulation strip body. The heat insulation strip body is provided with a hollow cavity, and the cross section of the heat insulation strip body is provided with an inner casing and an outer casing. The inner casing is in a non-rectangular shape, the outer casing is provided with a central part and two connecting parts, each connecting part is in a rectangular shape, and the two connecting parts are respectively connected on two sides of the central part. According to the heat insulation strip, the heat insulation effect can be improved, and the heat insulation strip has strong pressure resistant performance.