How to i convert pdf file into .dwg files(Autocad Drawingfile)?

U can't convert Pdf into drawing file bcoz The purpose of converting drawing to pdf is tht nobody can copy it only prints can be taken. so converting a drawing to pdf if like locking a drawing from unauthorised copying. For further information contact [email protected]

Try a web search or go to the following link: http://www.freedownloadscenter.com/Multimedia_and_Graphics/Mathematical_Graphing_Tools/PDF_to_DWG.html http://www.autodwg.com/pdf-to-dwg-converter/

you really cant, the best you can do is convert it to an image file, a .tiff preferably, then insert in a drawing file and use it as an underlay for your drawing.