The invention discloses a three-dimensional simulation method for construction of an architectural decoration project. The method is based on three-dimensional modeling software and comprises the following steps of: 1) according to decoration construction drawings and by using three-dimensional modeling software, establishing a three-dimensional model of a construction area, establishing node model data and material library, and forming a three-dimensional model database; 2) performing data comparison between the three-dimensional model database and the decoration construction drawings, and adjusting possible errors of the three-dimensional model database and/or the decoration construction drawings; 3) extracting three-dimensional models of nodes in the three-dimensional model database, and providing technical clarification to the construction side according to the three-dimensional models. Compared with the prior art, the three-dimensional simulation method for construction of architectural decoration project abandons the traditional way, and effectively improves decoration construction quality and efficiency.