The invention discloses a radial pressure application sintering forming mould. The radial pressure application sintering forming mould comprises a mould body. The mould body is provided with two inclined grooves penetrating through the upper end face and the lower end face, the two inclined grooves are crossed, a through hole is formed in the crossed portion, and grooves perpendicular to the through hole are formed in the two ends of the mould body respectively. Baffles are arranged in the grooves. Pressing heads are arranged in the inclined grooves, and the lower end faces of the pressing heads are arc faces matched with the through hole. Force application pressing plates are arranged on the upper end face and the lower end face of the mould body, and pressing feet of the pressing plates make contact with the surfaces of the pressing heads. The radial pressure application sintering forming mould can carry out radial pressing sintering forming of long and thin cylindrical grinding material layers on a one-way pressing or two-way pressing machine; compared with traditional axial pressing, the pressing thickness of powder blanks is greatly reduced, the long and thin cylindrical grinding material layers will not have gradient density difference generated in axial sintering pressing after sintering forming, and the overall sintering blank density is uniformly distributed, so that the overall quality reliability of finished grinding tools is greatly improved, and the application range is greatly widened.