The utility model relates to the field of lighting, the utility model discloses a mounting structure and lamps and lanterns with adjustable, wherein adjustable mounting structure includes first connecting piece, the second connecting piece, screw and nut, be provided with first bar groove on the first connecting piece, be provided with second bar groove on the second connecting piece, first connecting piece and the range upon range of setting of second connecting piece, first bar groove and the projection intercrossing of second bar groove along range upon range of orientation, pass first bargroove when the screw, second bar groove, and when the nut is screwed on the screw, first connecting piece and second connecting piece relatively fixed, when the nut loosening, first connecting piecesecond connecting piece relatively slides along the length direction in first bar groove, second bar groove respectively. The utility model discloses a have first bar groove first connecting piece, have the cooperation of second connecting piece, screw and the nut in second bar groove, can realize the slip of the relative second connecting piece of first connecting piece, and then realize the regulation of the relative second connecting piece position of first connecting piece.