The utility model discloses a female cutterbar of pipe, including cutting ring, cutting assembly and spacing subassembly, cutting assembly install in the inboard of cutting ring, spacing unit mount isin on the cutting ring for it carries on spacingly and makes pipe mother and cutting assembly offset to treat cutting pipe mother. The utility model discloses a female cutterbar of pipe have simple structure, easy and simple to handle, the cutting is efficient, the incision is level and smooth, be applicable to not advantage such as the female cutting of equidimension diameter pipe.