Abstract: A small mobile space includes a top plate, a bottom plate, and wall modules between the top plate and the bottom plate and is connected in sequence. The top plate, the bottom plate and the wall modules jointly define an accommodating space. A door assembly is arranged on at least one of the wall modules. A joint between every two adjacent wall modules, a joint between each wall module and the top plate, as well as a joint between the bottom plate and each of wall modules are clamped respectively by using a concave-convex structure. An air inlet module is arranged in the top plate and includes an air inlet channel, and a sound absorption component in the air inlet channel. An air inlet of the air inlet channel is communicated to the outside. An air outlet of the air inlet channel is communicated with the accommodating space.