The invention belongs to the technical field of textiles and particularly relates to warp and weft forwards and backwards entwisted interwoven impregnated core fabric for a conveyor belt. The white body fabric is formed by interweaving warp and weft. The weft and the warp are respectively composed of forwards entwisted yarn formed by twisting at least two strands of raw material yarn and backwards entwisted yarn formed by twisting at least two strands of the raw material yarn. The two strands of the warp form a group and the two strands of the warp of each group are used for forming forwards entwisted knots and backwards entwisted knots in the warp direction, wherein the forwards entwisted knots and the backwards entwisted knots are arranged at intervals. The weft is compactly arranged at the corresponding forwards entwisted knots and the corresponding backwards entwisted knots or in closed loops which are formed by the backwards entwisted knots, the forwards entwisted knots and the two strands of the warp. The outer surface of the white body fabric is provided with at least one glue layer which is formed through impregnation. The raw material yarn is chinlon filament yarn or polyester filament yarn. The warp is interwoven to fix the weft, the woven core fabric is not prone to deformation, the service life is long, off tracking is avoided in long-distance conveying with the manufactured conveyor belt, the glue layer and the rubber are stuck and off tracking is avoided. The service life of the conveyor belt is prolonged.