Propellant surface cross-shaped groove shaping cutter

The invention discloses a shaping tool for a cross-shaped groove in the surface of a propellant. The shaping tool comprises a tool rest, a rotating plate, a shaping tool handle, a locking nut and a shaping tool bit. The knife rest is a cylindrical piece with two open ends, an annular groove is formed in the inner wall of the knife rest, and a positioning pin passing hole is formed in the annular groove of the knife rest; the rotating plate is rotationally connected into an annular groove in the upper end opening part of the knife rest, and the rotating plate and the knife rest are rotationally locked by inserting a positioning pin; the tool rest is sleeved at the end part of the propellant grain to be shaped, and the tool rest and the propellant grain are positioned through the positioning screw; a shaping tool bit is fixed to the lower end of the shaping tool handle, the middle section of the shaping tool handle is in threaded connection with the locking nut, and the length, located on the lower end face of