The invention discloses a special mould and an impregnation method for continuous fiber and resin synthesis. The special mould comprises a fiber impregnated mould and a resin extrusion mechanism, wherein the fiber impregnated mould comprises an upper mould and a lower mould; a cavity of the upper mould matched with the lower mould comprises three areas including a feeding area, an impregnating area and an adjusting area along the continuous fiber moving direction, wherein the feeding area has a gap of 3-10 mm and has three wave troughs and two wave crests, and the angles formed by the wave troughs and the wave crests are 120-150 degrees; the dipping area has a gap of 1-3 mm and has three wave troughs and two wave crests, and the angles formed by the wave troughs and the wave crests are 100-120 degrees; the adjusting area has a gap of 0.3-1 mm and is in a 'V' shape on the whole, and the angle formed by the two inclined sides of the 'V'-shaped adjusting area is 80-110 degrees. With the special mould and the impregnation method, resin can be evenly distributed on the surfaces of continuous fibers.