The invention relates to a method and device for calculating different soil earthwork volumes based on BIM software, and the method comprises the steps: obtaining the stratum information of each soilstratum of each geological drill hole, inputting the stratum information of each geological drill hole into a pre-built excel table according to a fixed format, and carrying out the arrangement of thestratum information; importing the organized stratum information into different layers of Civil3d or Powercivil software according to the types of the soil layers so as to determine space coordinatepoints of the soil layers; and creating a corresponding three-dimensional curved surface in Civil3d or Powercivil by utilizing the space coordinate points of each soil layer and the elevation data ofthe earth surface, and calculating the earthwork volumes of different soil textures according to the three-dimensional curved surface. According to the three-dimensional geological curved surface modeling method provided by the invention, modeling is carried out according to the drilling data through an excel table and Civil3d or Powercivil software, the problems of stratum sequence reversing andstratum missing are solved, compared with a traditional method for calculating the earth excavation volume of different soil textures, the method is higher in precision, and compared with professionalthree-dimensional geologic modeling software and the like, the operation and implementation modes of the method are simpler and clearer.