The invention relates to a method to manufacture a knife handle by rolling and solves the problem that since end face and conical face of a knife handle are processed in different steps, high coaxiality and geometric tolerance cannot be guaranteed and production efficiency is low. After finish turning, rolling is performed through a rolling member; the rolling member has a conical hole mating witha conical face of a knife handle; a large end face of the conical hole has a coaxial ring concave face mating with an end face of the knife handle; a conical face of the conical hole is evenly provided with a plurality of semicircular-section grooves in moving fit with first roll pins having circular section; a plurality of semicircular-section radial grooves evenly arranged in circular concave face 1 are in moving fit with second roll pins having circular section; the rolling member is in transmission connection with a first power input shaft; the knife handle is in transmission connection with a second power input shaft; the first and second power input shafts rotate in opposite directions; the knife handle applies axial pressure to the rolling member; therefore, production efficiency and knife handle precision can be effectively improved, and surface quality of the knife handle can be improved.