The utility model relates to a sealing strip of a bathroom roof, which is characterized in that: a sealing strip (3) is in a strip shape and is positioned at the joint of a bathroom roof (1) and a bathroom wall (2), and the head (6) of the cross section of the sealing strip (3) is in a hammer shape with a flat upper part and a peaked lower part; and a plurality of externally convex saw-toothed structures (4) are arranged at the middle back part of the cross section of the seal (3). The utility model has the beneficial effects that: the sealing strip replaces the traditional waterproof glue to seal, thereby not only saving time and labor in injection molding, but also having good sealing effect, firm bonding and difficult falling-off because the sealing strip has a plurality of sealing structures, and simultaneously having simple installation and meeting the aesthetic requirements of the whole bathroom.