The utility model discloses a portable cable well cover opening tool, include and constitute the work arm by quiet arm and swing arm, stack around quiet arm and the swing arm, round pin axle in the through -hole of upper end is articulated mutually, the position at the skew axis place of the through -hole of tip is extended to both sides respectively and is formed quiet spout and move the spout under quiet arm and the swing arm, quiet spout with move the spout and is run through by the slide -bar, the slide -bar is connected with the lower extreme of trace, quiet arm and swing arm lower extreme be equipped with respectively with quiet spout, move the work hook that spout extending direction is opposite, two linking arm fixed connection that are parallel to each other on the upper end of quiet arm and the bearing handle, be equipped with the slide opening on two linking arms relatively, the both ends of crosspiece be equipped with with slide opening complex sliding surface, the crosspiece is through the slide opening, the sliding surface location is between two linking arms, the upper end of trace is connected with the crosspiece, and the outer tip of two sliding surfaces still is equipped with set nut, is equipped with reset spring respectively at the both ends of linking arm, is equipped with the control handle on the crosspiece, the utility model discloses can open all kinds of cable well cover high -efficient, laborsavingly.