The utility model relates to an electric power field, concretely relates to electric power anti -theft device of acting as go -between, including acting as go -between the cabinet, the wheel rolls, the push rod, the switch door, the switch lock, automatically controlled telescopic link, trapping mechanism, sundries tank with put the line rim plate, the push rod sets up in the cabinet left side ofacting as go -between, the switch door sets up in acting as go -between cabinet top and pass through the hinge with the cabinet of acting as go -between and link, the switch door is two, and be provided with the switch lock between two, the wheel that rolls is four and just sets up respectively in four angles in cabinet bottom of acting as go -between, sundries tank sets up in the inside right side of cabinet of acting as go -between, automatically controlled telescopic link sets up in the inside left side of cabinet of acting as go -between, automatically controlled telescopic link top is provided with trapping mechanism, it sets up inside the cabinet of acting as go -between through the pivot connection to put the line rim plate, the utility model discloses easily installing and dismantling, its switch door plays the theftproof effect, wholly is convenient for remove and accomodate, and automatically controlled telescopic link is convenient for adjust the height that presss from bothsides the line, puts line rim plate 9 and can be used to the convenient storage electric wire, has very strong practicality.