The invention discloses a method for carrying out rapid and stable water cutting on burrs of a forged piece. The method for carrying out rapid and stable water cutting on the burrs of the forged piececomprises the following steps: a sample plate is produced, the sample plate is provided with a cavity, and the shape and the dimensions of the cavity meet the requirement that the sample plate is capable of sleeving outside the forged piece, and the forged piece is clamped into the cavity; two reference holes are machined in the sample plate, the forged piece is fixed to a water cutting working platform, and the sample plate sleeves outside the forged piece; the positions of the two reference holes are identified by virtue of a water cutting tool bit, one reference hole is taken as an origin,the connection line of the two reference holes is taken as a coordinate axis, a line vertical to the connection line of the two reference holes is taken as another coordinate axis, and a reference coordinate system is established; a water cutting feed path for the forged piece is compiled in the reference coordinate system, and the water cutting feed path is enabled to be the same as the outlineof the forged piece; and the sample plate is taken down, and a program is called to machine. According to the method for carrying out rapid and stable water cutting on the burrs of the forged piece, by introducing the sample plate, the time of repeatedly debugging and determining machining reference during the water cutting for the burrs of the forged piece is avoided, so that the production efficiency is increased.