The utility model relates to the field of electric power rush repairing, and particularly relates to an insulating tree pruner. The insulating tree pruner comprises a long knife handle and a short knife handle, wherein the short knife handle is fixed on an insulating bar, the front end of the long knife handle is pivoted with the short knife handle, the tail end of the long knife handle is provided with a movable pulley, the long knife handle and the short knife handle are further provided with a spring therebetween, the insulating bar is provided with a fixed pulley, and the fixed pulley and the movable pulley are connected in a linkage mode through an insulating rope.