Abstract: A locking mechanism of a worktable for a drilling machine includes: a worktable has a loading surface formed on a top thereof for loading. A space is defined in the worktable and a wire coil is received therein. A spindle is longitudinally and centrally mounted to a bottom of the worktable. A connecting portion is mounted onto a periphery of the spindle and includes a locating assembly and a conducting assembly mounted in the locating assembly for electrically connecting the wire coil. The locating assembly has at least one fixing hole defined therein. And at least one fixing rod is mounted into the fixing hole for fixing the locating assembly and maintaining the electromagnetic field.