Method for continuously preforming composite material in uncured state

A method for continuously preforming a prepreg composite material into a long linear member in an uncured state, the method comprising:

• a step of sending out a prepreg material wound in a roll;
• a step of laminating the prepreg material sent out from the roll and bending the same into a given cross-sectional shape;
• a step of preforming the bent prepreg material in a mold having a heater;
• and
• a step of pulling out the preformed prepreg material from the mold;
• wherein
• the step of preforming the prepreg material in the mold is performed under such a processing condition of temperature and pressure that thermosetting resin impregnated in the prepreg material is not cured completely but the prepreg material maintains the formed shape, and in a post process, the preformed composite material is deformed into a three-dimensional shape corresponding to a counterpart member and completely cured so as to constitute a reinforcement member of the counterpart member.