Automatic method for converting three-dimensional information model into two-dimensional design drawing

The invention discloses an automatic method for converting a three-dimensional information model into a two-dimensional design drawing, which comprises the following steps of: designing a three-dimensional model by a three-dimensional model designer, and adding attribute information to each part of the model after the three-dimensional model is designed; exporting the three-dimensional model into a three-dimensional drawing format by using three-dimensional model design software; opening the three-dimensional drawing in two-dimensional drawing design software; generating a two-dimensional drawing according to the three-dimensional model information on the drawing; according to the method, the process of re-drawing a two-dimensional drawing is omitted, designers can easily operate without special learning, topological information is reserved after projection, deep application can be carried out, when design changes exist, regeneration of the drawing can be rapidly completed, and the consistency of the drawing