In the dialog box, change the "Files of type" dropdown to Google Earth KML (*.kml, *.kmz) . Locate File: Browse to your file and click OK.
If you don’t have Civil 3D and don’t want to buy a plugin, you can convert the KML file into a format AutoCAD loves: DXF. how to import kml to autocad
Pick a reference point in your drawing that corresponds to a real-world longitude and latitude. In the dialog box, change the "Files of
Users with standard AutoCAD typically rely on third-party tools (see Method C). In the dialog box
A secondary dialog will appear. You can map the KML data attributes to specific AutoCAD layers or object data here. Finish: Click OK to bring the geometry into your workspace.
Drag your KML file directly into the QGIS workspace.