Add a Trash icon to the Desktop
Prior to Mac OS X, there used to be a Trash icon on the Desktop. You can replicate this functionality by creating a symbolic link of the Trash to a folder named Trash on your desktop, here’s how to do this.
Launch the Terminal and type the following:
ln -s ~/.Trash ~/Desktop/Trash
A folder named ‘Trash’ will appear on your desktop, and it has direct access to the Trash in the Dock. You can assign any icon you’d like to this folder to make it look like a Trash can. Any files or folders you drag here will be sent to the Trash as usual, but it lacks the ability to eject disks. If you want to remove the desktop Trash icon, just drag it to the Trash!