Cutting pliers include a first plier body and a second plier body. The first plier body includes a support end and a first handle coupled to each other. The second plier body includes a cutting end and a second handle coupled to each other. The first handle and the second handle are rotationally coupled by a connecting shaft. The support end and the cutting end cooperatively form jaws for cutting a pipe. The support end comprises a convex arcuate surface for supporting a pipe. The cutting end comprises two clamping arms and a blade. The blade is arranged between the two clamping arms. When the jaws are closed, a clamping end of the clamping arms abuts against the pipe, the pipe on the arcuate support surface is squeezed and deformed along the arcuate support surface to form an arcuate pipe, and the blade abuts against the arcuate pipe.