The invention discloses a system and method for converting DFT files into DWG files in batches. The system comprises a user input module, a file conversion module, an element recognition module and a DWG document processing module, wherein the file conversion module is used for converting DFT files into temporary DWG files, traversing all the entities in the DWG files, storing all the entity information into an object set, deleting a title bar and a frame in the object set, retaining the residual entity information, opening a title bar template to serve as a new drawing area, extracting the residual entity information from the object set and inserting the extracted residual entity information into the new drawing area, and deleting the temporary DWG files; and the element recognition module is used for traversing all the entities in the object set and determining and classifying types to which the entities belong. According to the method and device, the converted DWG-format files can avoid the problems that the characters are dislocated, the linear scale is wrong and the title bar cannot be recognized, so that the function of converting DFT files into DWG files in batches is realized and the conversion efficiency is high.