The invention discloses building temporary ground which comprises a carpet, a first multilayer board, rough ground, a second multilayer board, fine sand and a sound absorption carpet, wherein the carpet is directly laid on the upper portion of original building ground; the first multilayer board is a fireproof multilayer board and is directly laid on the upper portion of the carpet. The rough ground is parallelly laid on the first multilayer board side by side and is connected with the first multilayer board through gun nails. The second multilayer board is a fireproof multilayer board and is laid on the rough ground and connected with the rough ground through gun nails. The first multilayer board, the rough ground and the second multilayer board form an accommodating cavity. The fine sand fills the accommodating cavity. The sound absorption carpet adheres to the upper surface of the second multilayer board through glue. The building temporary ground is simple in structure, safe, reliable and environmentally friendly, and the newly built ground has functions of pressure bearing, environmental protection, fire prevention, sound absorption and easiness in dismantling. The building temporary ground is particularly suitable for ground protection in case of temporary use of various stadiums.