The invention discloses a high matrix drilling tooth and a preparation method thereof. The high matrix drilling tooth comprises a diamond-containing metal-based working layer, a diamond-free transition layer and a welding layer, wherein one to four reinforcing layer(s) is/are added in the thickness direction in the working layer of the high matrix drilling tooth, namely the tooth arc radial direction; the reinforcing layers are firmly combined with the working layer of the drilling tooth by compression moulding and sintering processes; the breaking strength of a drill bit which is manufactured by the drilling tooth is greatly improved. According to the high matrix drilling tooth which is manufactured by the method, the drilling tooth is not easy to break off, the drilling tooth can be normally consumed until the diamond-containing layer is used up, and the service life of the drill bit which is manufactured by the drilling tooth is longer than that of a common drill bit; meanwhile, due to the existence of the reinforcing layers, an annular water groove is formed in the working face of the drilling tooth, the drilling specific pressure is favorably improved, the drilling efficiency is improved, the drilling stability and the chip removal and cooling capacities are also improved.