An engageable abutment, the structure of the engageable abutment is designed to have an engageable sleeve on a base; the engageable sleeve has three functions: 1. It is adapted to being formed thereover a contemporary tooth crown that can be used for waiting healing of gingiva. 2. It has the function of transfer copying, and can be taken out; when in cast making an eternal tooth crown, the eternal tooth crown can be directly shaped in the sleeve for the convenience of fast and accurate assembling of the eternal tooth crown on the base. 3. It can alternatively be provided thereover with an eternal movable artificial tooth. Therefore, the present invention has a plurality of functions beneficial to processing of a dental implant surgical operation.