The expandable house is a new innovative temporary building product that combines folding and expansion technology to provide a more spacious and flexible space solution. Through the unique expandable design, this product can quickly expand into a spacious activity space, which is suitable for a variety of scenarios such as construction site office, temporary accommodation, and mobile meetings. Its efficient folding function makes transportation and storage more labor-saving. The structure adopts high-strength steel frame and high-quality environmentally friendly materials, featuring excellent wind and earthquake resistance, as well as good heat and sound insulation.