Taking 3ds Max script (MAXScript) as the main modeling and manual assembly of substation buildings as a supplement, a method for constructing 3D substation models based on 3D laser scanning point cloud data is proposed. The proposed method can solve the problems of low efficiency of manual modeling of substation 3D modeling and poor model scalability. Taking the 3D modeling of a 110 kV substation in Fuyuan County, Yunnan Province, as an example, the experimental results show that the proposed method can meet the accuracy requirements of the model to a certain extent and can reduce the modeling cost of the substation and improve its modeling efficiency.