The utility model relates to a scissors the cutting tip of which can be replaced rapidly, which comprises a scissors bracket, a roller, a screw rod rapid returning mechanism and a scissors handle, wherein, the lower part of the scissors bracket is provided with a rapid returning button consisting of a threaded block and a clamping roller mechanism, and the screw rod rapid returning mechanism is provided with a pipe cutting wheel mechanism, and both sides of the pipe cutting wheel are provided with a circular bead that is higher than the upper end part of the screw rod returning bracket, and the threaded block is engaged with a screw rod of the screw rod rapid returning mechanism; the clamping roller mechanism comprises a clamping roller that is arranged on a clamping roller bracket through a clamping roller shaft, and the surface of the clamping roller is contacted with the surface of the threaded block so as to realize the coupling between the threaded block and the screw rod, to play the role for adjusting the openness of the scissors and to simplify the structure; the cutting tip of the pipe cutting wheel adopts the high-impact tool steel and can be replaced, and one side of a pin shaft is provided with rose work, so that the cutting tip is uneasy to slide when being replaced; the replaced cutting tip not only can cut off the metal pipe with large diameter, but also can cut off the plastic pipe such as PEX with large diameter, thereby saving labor power, and being convenient and easy to be operated.