The invention relates to a dental implant, which comprises a body part which is implanted into alveolar bone, an abutment for bushing an artificial tooth and a neck part for connecting the body part and the abutment, wherein the side surface and the bottom surface of the body part are rough surfaces; the neck part is of a frustum-shaped structure which gradually contracts; the root end radial dimension of the neck par is less than the upper end radial dimension of the body part, so that the part, which is not occupied by the root end of the neck part, of the upper end of the body part is formed into a platform plane in a horizontal direction; and the platform plane is a rough surface. According to the dental implant provided by the invention, the platform plane on the upper surface of the body part of the dental implant is designed as the rough surface, and the alveolar bone is guided to extend and grow to the platform plane, so that micro-gaps and slight moving between various parts of a dental implant are reduced, and the implantation stability of the dental implant is enhanced; therefore, the achievement ratio of an operation is improved and pain in a patient is reduced; and the dental implant is quite high in practical value.