The invention discloses a building block connecting assembly and a building block robot. The building block connecting assembly comprises at least two crawler joints, wherein the crawler joints are detachably connected. The building block connecting assembly has the advantages that the building block connecting assemblies with different lengths can be built according to requirements of different projects; when the building blocks are built, the practical ability of a user is exercised; every two crawler joints are tightly connected, so that the disconnecting is not liable to occur; every two crawler joints can be connected without other small parts, so that the number of parts is reduced, the accommodation is convenient, and the losing of parts is avoided; every two crawler joints can be mutually connected, so that the universality is strong. By adopting the building block connecting assembly, the building block robot has the advantages that the service life is long, and the number of components and parts is fewer.