Abstract: In a certain super-high-rise building project, due to the extremely narrow site and space, only one tower crane can be installed in the core tube of the main tower for auxiliary construction. This paper discusses a series of key technologies for the built-in tower crane such as positioning, model selection, basic practices, jacking planning, attached wall nodes, overhead dismantling, etc., as well as key technologies for quickly filling the horizontal structure of the construction core tube after the tower crane is dismantled. In this case, the construction process went smooth and the construction process reached the preset object of the project. The case of the whole process construction of this tower crane is typical, and can be referenced and provided as a reference for similar projects.