Carbon fiber recycling method

A carbon fiber recycling method, adapted to recycle a first carbon fiber from a carbon fiber polymer composite which comprises a polymer matrix and the first carbon fiber, wherein the polymer matrix is coupled to the first carbon fiber, the first carbon fiber comprises a first long axis direction, and the carbon fiber recycling method utilizes a carbon fiber recycling device, and the carbon fiber recycling device comprises:

• at least one first microwave supplying unit and a cavity, the interior of the cavity is opened to have an accommodating space, and the cavity has a second long axis direction;
• wherein the carbon fiber recycling method comprises:
• disposing the carbon fiber polymer composite in the accommodating space;
• making the first microwave supplying unit to generate a first microwave, the first microwave has a first microwave direction, the first microwave is propagated to interior of the cavity;
• the first microwave comprises a first electric field, and the first electric field in the interior of the cavity has a first electric field direction;
• adjusting the first microwave supplying unit to change an angle between the first electric field direction and the second long axis direction, and making the first long axis direction of the first carbon fiber be parallel to the first electric field direction.