The utility model provides a kit replacement type toothbrush which is provided with a handle part and a combined brush head connected with one end of the handle. The combined brush head comprises a platform which is connected with the handle part, and a toothbrush patch, the surface of which is implanted with brush hair; wherein a caulking groove and an embedded part, which can be mutually embedded and integrated are formed on the platform and the toothbrush patch in a matching way, so that the toothbrush patch with brush hair can be embedded and integrated on the platform, and a detachable and replaceable kit type structure is achieved.